| Publication | Date of Publication | Type |
|---|
| Periodic solutions for nonlinear systems of ODE's with generalized variable exponents operators | 2024-02-23 | Paper |
| A brief history of the Jacobian | 2024-02-16 | Paper |
| In memoriam: Jaroslav Kurzweil (1926--2022) | 2023-05-12 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5885169 | 2023-03-27 | Paper |
| The Brouwer fixed point theorem and periodic solutions of differential equations | 2023-01-05 | Paper |
| Existence of a priori bounded solutions for discrete two-point boundary value problems | 2022-11-28 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3382948 | 2021-09-22 | Paper |
| First order difference systems with multipoint boundary conditions | 2021-06-04 | Paper |
| Existence of periodic solutions and bifurcation points for generalized ordinary differential equations | 2021-05-31 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5856013 | 2021-03-23 | Paper |
| Brouwer Degree | 2021-01-26 | Paper |
| An abstract averaging method with applications to differential equations | 2020-12-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3297890 | 2020-07-21 | Paper |
| Bound sets and two-point boundary value problems for second order differential systems | 2020-07-02 | Paper |
| Multiple critical orbits to partial periodic perturbations of the \(p\)-relativistic operator | 2020-05-04 | Paper |
| A tribute to Juliusz Schauder | 2020-02-05 | Paper |
| Homoclinics for singular strong force Lagrangian systems | 2019-08-30 | Paper |
| Existence and non-existence of limit cycles for Liénard prescribed curvature equations | 2019-06-21 | Paper |
| Simple Proofs of the Hadamard and Poincaré–Miranda Theorems Using the Brouwer Fixed Point Theorem | 2019-03-13 | Paper |
| Felix Browder (1927-2016) | 2019-01-31 | Paper |
| (Super)critical nonlocal equations with periodic boundary conditions | 2018-09-21 | Paper |
| Second order systems with nonlinear nonlocal boundary conditions | 2018-09-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4641690 | 2018-05-18 | Paper |
| A Brezis-Nirenberg type result for a nonlocal fractional operator | 2017-09-15 | Paper |
| Periodic solutions of some autonomous Liénard equations with relativistic acceleration | 2017-08-03 | Paper |
| Upper and lower solutions for periodic problems: first order difference vs first order differential equations | 2017-07-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5270010 | 2017-06-28 | Paper |
| Bolzano's theorems for holomorphic mappings | 2017-06-15 | Paper |
| A vector p-Laplacian type approach to multiple periodic solutions for the p-relativistic operator | 2017-05-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2977463 | 2017-04-18 | Paper |
| Morse theory and multiple periodic solutions of some quasilinear difference systems with periodic nonlinearities | 2017-03-15 | Paper |
| Convex sets and second order systems with nonlocal boundary conditions at resonance | 2017-02-22 | Paper |
| Recent results on multiple periodic solutions of forced relativistic pendulum-type continuous and discrete systems | 2016-11-08 | Paper |
| Positive solutions for a discrete two point nonlinear boundary value problem with \(p\)-Laplacian | 2016-11-02 | Paper |
| Prescribed mean curvature graphs with Neumann boundary conditions in some FLRW spacetimes | 2016-10-21 | Paper |
| Second-order ordinary differential systems with nonlocal Neumann conditions at resonance | 2016-10-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2816338 | 2016-07-05 | Paper |
| Couples of lower and upper slopes and resonant second order ordinary differential equations with nonlocal boundary conditions | 2016-05-31 | Paper |
| A simple proof of multiplicity for periodic solutions of Lagrangian difference systems with relativistic operator and periodic potential | 2016-04-29 | Paper |
| Corrigendum to: The Dirichlet problem with mean curvature operator in Minkowski space | 2016-03-01 | Paper |
| Radial solutions of a Neumann problem coming from a burglary model | 2016-02-09 | Paper |
| Periodic solutions for discontinuous perturbations of the relativistic operator | 2016-01-28 | Paper |
| Point spectrum and existence results for a pair of duality mappings corresponding to different gauge functions | 2015-12-11 | Paper |
| Book review of: A. Kristály et al., Variational principles in mathematical physics, geometry, and economics. Qualitative analysis of nonlinear equations and unilateral problems | 2015-11-02 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2948825 | 2015-10-06 | Paper |
| Three solutions for a two-point boundary value problem with the prescribed mean curvature equation. | 2015-09-29 | Paper |
| A tribute to Patrizia Pucci | 2015-07-21 | Paper |
| Periodic solutions of Lagrangian difference systems: Periodic nonlinearities (almost) don’t matter | 2015-07-21 | Paper |
| Multiple Radial Solutions at Resonance for Neumann Problems Involving the Mean Extrinsic Curvature Operator | 2015-07-03 | Paper |
| Existence results for parametric boundary value problems involving the mean curvature operator | 2015-06-23 | Paper |
| Solvability of a nonlinear Neumann problem for systems arising from a burglary model | 2015-06-22 | Paper |
| Periodic Solutions of Differential and Difference Systems with Pendulum-Type Nonlinearities: Variational Approaches | 2015-05-07 | Paper |
| Multiple periodic solutions for perturbed relativistic pendulum systems | 2015-04-22 | Paper |
| Boundary value problems for a class of first order quasilinear ordinary differential equations | 2015-03-03 | Paper |
| The \textit{Cours d'analyse infinitésimale} of Charles-Jean de La Vallée Poussin: from innovation to tradition | 2015-01-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2925959 | 2014-10-29 | Paper |
| The Dirichlet Problem with Mean Curvature Operator in Minkowski Space – a Variational Approach | 2014-10-15 | Paper |
| The implicit function theorem and its substitutes in Poincaré's qualitative theory of differential equations | 2014-08-29 | Paper |
| Existence of solutions for a 1-D boundary value problem coming from a model for burglary | 2014-05-26 | Paper |
| Variations on some finite-dimensional fixed-point theorems | 2013-11-25 | Paper |
| Homotopy and nonlinear boundary value problems involving singular \(\phi\)-Laplacians | 2013-08-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4922995 | 2013-06-04 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4922996 | 2013-06-04 | Paper |
| Variations on Poincaré-Miranda’s Theorem | 2013-05-22 | Paper |
| Resonance Problems for Some Non-autonomous Ordinary Differential Equations | 2013-04-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4913602 | 2013-04-08 | Paper |
| Juliusz Schauder, Topology of Function Spaces and Partial Differential Equations | 2013-04-03 | Paper |
| Periodic solutions of second order Lagrangian difference systems with bounded or singular \(\phi\)-Laplacian and periodic potential | 2013-03-14 | Paper |
| Radial solutions of Neumann problems involving mean extrinsic curvature and periodic nonlinearities | 2013-02-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3144729 | 2012-12-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2917734 | 2012-10-01 | Paper |
| Multiplicity of solutions of variational systems involving \(\phi\)-Laplacians with singular \(\phi\) and periodic nonlinearities | 2012-08-30 | Paper |
| Periodic solutions of second order nonlinear difference systems with \(\phi\)-Laplacian: A variational approach | 2012-07-12 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2888970 | 2012-06-04 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3099779 | 2011-12-01 | Paper |
| Multiple solutions for Neumann and periodic problems with singular \(\phi \)-Laplacian | 2011-11-24 | Paper |
| Radial solutions of Neumann problem for periodic perturbations of the mean extrinsic curvature operator | 2011-10-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3172467 | 2011-10-05 | Paper |
| Bounding Surfaces and Second Order Quasilinear Equations with Compatible Nonlinear Functional Boundary Conditions | 2011-09-23 | Paper |
| Periodic solutions of the forced relativistic pendulum | 2011-09-02 | Paper |
| Variational methods for nonlinear perturbations of singular \(\varphi \)-Laplacians | 2011-06-23 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3005663 | 2011-06-09 | Paper |
| Nagumo conditions and second-order quasilinear equations with compatible nonlinear functional boundary conditions | 2011-05-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3169293 | 2011-04-28 | Paper |
| Origin and evolution of the Palais-Smale condition in critical point theory | 2011-02-18 | Paper |
| Some direct and remote relations of Gauss with Belgian mathematicians | 2010-12-17 | Paper |
| Schrödinger and Dirac equations for the hydrogen atom, and Laguerre polynomials | 2010-12-10 | Paper |
| Periodic solutions of pendulum-like perturbations of singular and bounded \({\varphi}\)-Laplacians | 2010-11-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3162560 | 2010-10-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3587674 | 2010-09-08 | Paper |
| Radial solutions for Neumann problems with \(\phi\)-Laplacians and pendulum-like nonlinearities | 2010-07-23 | Paper |
| A constructive fixed point approach to the existence of a triangle with prescribed angle bisector lengths | 2010-07-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3574209 | 2010-07-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3568051 | 2010-06-17 | Paper |
| Radial solutions for Neumann problems involving mean curvature operators in Euclidean and Minkowski spaces | 2010-04-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3656217 | 2010-01-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3630855 | 2009-06-04 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3620583 | 2009-04-14 | Paper |
| Nonhomogeneous boundary value problems for some nonlinear equations with singular \(\phi\)-Laplacian | 2009-04-14 | Paper |
| Boundary value problems for some nonlinear systems with singular \(\phi\)-Laplacian | 2009-02-17 | Paper |
| MAXIMUM PRINCIPLES AROUND AN EIGENVALUE WITH CONSTANT EIGENFUNCTIONS | 2009-02-10 | Paper |
| Radial solutions for some nonlinear problems involving mean curvature operators in Euclidean and Minkowski spaces | 2009-02-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5503048 | 2009-01-12 | Paper |
| Boundary value problems for second-order nonlinear difference equations with discrete φ-Laplacian and singular φ | 2008-11-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3525262 | 2008-09-12 | Paper |
| Planar differential systems at resonance | 2008-06-27 | Paper |
| Multiple periodic solutions of ordinary differential equations with bounded nonlinearities and \(\varphi\)-Laplacian | 2008-06-06 | Paper |
| Periodic solutions of nonlinear perturbations of \(\phi\)-Laplacians with possibly bounded \(\phi\) | 2008-03-06 | Paper |
| Jean Leray and nonlinear integral equations: a partially forgotten legacy | 2008-02-22 | Paper |
| Existence and multiplicity results for some nonlinear problems with singular \(\phi\)-Laplacian | 2007-12-21 | Paper |
| Resonance and nonlinearity: A survey | 2007-12-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5428792 | 2007-11-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5421100 | 2007-10-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3593954 | 2007-08-06 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3432564 | 2007-04-17 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3432493 | 2007-04-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3431955 | 2007-04-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3427731 | 2007-03-23 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3426111 | 2007-03-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3422911 | 2007-02-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3422924 | 2007-02-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3422928 | 2007-02-20 | Paper |
| Boundary-value problems with non-surjective \(\varphi\)-Laplacian and one-sided bounded nonlinearity | 2006-10-31 | Paper |
| Periodic solutions of quaternionic-valued ordinary differential equations | 2006-09-28 | Paper |
| Existence and multiplicity results for periodic solutions of nonlinear difference equations | 2006-09-25 | Paper |
| The periodic Ambrosetti-Prodi problem for nonlinear perturbations of the \(p\)-Laplacian | 2006-09-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5698849 | 2006-04-26 | Paper |
| Periodic solutions of forced dissipative \(p\)-Liénard equations with singularities | 2006-03-07 | Paper |
| Periodic solutions of some semilinear wave equations and systems: a survey. | 2006-02-16 | Paper |
| Rediscovering the contributions of Rodrigues on the representation of special functions | 2006-02-02 | Paper |
| Parameter dependent pull-back of closed differential forms and invariant integrals | 2006-01-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5716732 | 2006-01-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5713338 | 2005-12-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5713340 | 2005-12-14 | Paper |
| Simple proofs of various fixed point and existence theorems based on exterior calculus | 2005-12-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5702828 | 2005-11-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5703446 | 2005-11-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5703734 | 2005-11-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5701079 | 2005-11-02 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5694119 | 2005-09-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5692612 | 2005-09-28 | Paper |
| A Simple Approach to Brouwer Degree Based on Differential Forms | 2005-03-30 | Paper |
| Maximum principles for bounded solutions of the telegraph equation in space dimensions two and three and applications | 2005-02-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4822514 | 2004-10-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4475004 | 2004-07-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4466548 | 2004-06-08 | Paper |
| Periodic or bounded solutions of Carathéodory systems of ordinary differential equations | 2004-03-15 | Paper |
| Periodic Solutions of Singular Nonlinear Perturbations of the Ordinary p-Laplacian | 2003-10-16 | Paper |
| Almost-periodic oscillations of monotone second-order systems | 2003-09-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3152414 | 2003-09-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2764203 | 2003-07-23 | Paper |
| Boundary blow-up for differential equations with indefinite weight | 2003-04-02 | Paper |
| A maximum principle for bounded solutions of the telegraph equation in space dimension three | 2003-01-13 | Paper |
| Variational and topological methods for Dirichlet problems with \(p\)-Laplacian | 2002-09-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4548717 | 2002-08-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2711945 | 2002-06-30 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4536857 | 2002-06-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4247754 | 2002-03-10 | Paper |
| Periodic solutions of some complex-valued Liénard and Rayleigh equations | 2002-03-06 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4527135 | 2002-02-22 | Paper |
| The spectrum of \(p\)-Laplacian systems with various boundary conditions and applications | 2002-02-04 | Paper |
| Guiding-like functions for periodic or bounded solutions of ordinary differential equations. | 2002-01-01 | Paper |
| A Hartman-Nagumo inequality for the vector ordinary \(p\)-Laplacian and applications to nonlinear boundary value problems. | 2002-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4330056 | 2002-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4518249 | 2001-12-12 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2757922 | 2001-12-05 | Paper |
| Diophantine approximation, Bessel functions and radially symmetric periodic solutions of semilinear wave equations in a ball | 2001-10-21 | Paper |
| Periodic solutions of equations with oscillating nonlinearities | 2001-04-25 | Paper |
| Some boundary value problems for Hartman-type perturbations of the ordinary vector \(p\)-Laplacian | 2001-04-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2707731 | 2001-04-03 | Paper |
| Leray-Schauder degree: A half century of extensions and applications | 2001-03-09 | Paper |
| A maximum principle for bounded solutions of the telegraph equations and applications to nonlinear forcings | 2001-01-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4513808 | 2000-11-19 | Paper |
| CONTINUATION THEOREMS FOR AMBROSETTI-PRODI TYPE PERIODIC PROBLEMS | 2000-11-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4946291 | 2000-08-28 | Paper |
| The index at infinity for some vector fields with oscillating nonlinearities | 2000-08-16 | Paper |
| Oscillations of a forced asymmetric oscillator at resonance | 2000-08-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4485524 | 2000-06-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4939131 | 2000-05-04 | Paper |
| Bounded Solutions of Some Second Order Nonlinear Differential Equations | 2000-04-25 | Paper |
| Bounded solutions of second order semilinear evolution equations and applications to the telegraph equation | 1999-12-13 | Paper |
| In memoriam Jean Leray (1906-1998) | 1999-09-30 | Paper |
| Lyapunov vector functions in nonlinear oscillation problems | 1999-05-24 | Paper |
| Leray-Schauder continuation theorems in the absence of a priori bounds | 1999-05-03 | Paper |
| Periodic solution for nonlinear systems with \(p\)-Laplacian-like operators | 1999-04-19 | Paper |
| Positive solutions to boundary value problems for second-order ordinary differential equations with singular nonlinearities | 1999-04-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4231489 | 1999-03-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4394557 | 1998-06-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4364439 | 1998-03-12 | Paper |
| Integration over unbounded multidimensional intervals | 1998-01-28 | Paper |
| The index at infinity of some twice degenerate compact vector fields | 1997-12-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4718486 | 1997-09-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4347837 | 1997-08-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3126819 | 1997-04-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861141 | 1997-02-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4884632 | 1997-01-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858604 | 1996-12-04 | Paper |
| On the existence of two solutions with a prescribed number of zeros for a superlinear two-point boundary value problem | 1996-10-15 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4893097 | 1996-09-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858605 | 1996-07-09 | Paper |
| Periodic solutions of complex-valued differential equations and systems with periodic coefficients | 1996-06-30 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858608 | 1996-05-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4860450 | 1996-03-31 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4867016 | 1996-03-19 | Paper |
| Differential inequalities in problems of forced nonlinear oscillations | 1996-02-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4852494 | 1996-02-20 | Paper |
| The Hake's property for some integrals over multidimensional intervals | 1996-02-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858614 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858615 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858616 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861172 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861173 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861175 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861184 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861190 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861193 | 1996-02-08 | Paper |
| Oscillatory properties of solutions and nonlinear differential equations with periodic boundary conditions | 1996-01-28 | Paper |
| On some higher order boundary value problems at resonance | 1996-01-17 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861183 | 1996-01-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861186 | 1996-01-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4328227 | 1995-11-13 | Paper |
| A continuation theorem for periodic boundary value problems with oscillatory nonlinearities | 1995-11-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4288524 | 1995-06-07 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4308157 | 1995-03-15 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4293993 | 1995-03-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4308220 | 1995-02-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4315876 | 1995-01-30 | Paper |
| A general symmetry principle and some implications | 1994-12-14 | Paper |
| Plenary Lectures | 1994-11-21 | Paper |
| A continuation approach to fourth order superlinear periodic boundary value problems | 1994-11-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3140332 | 1994-11-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4280915 | 1994-10-26 | Paper |
| Generalized guiding functions in a problem on high frequency forced oscillations | 1994-10-17 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4308211 | 1994-10-04 | Paper |
| A continuation approach to some forced superlinear Sturm-Liouville boundary value problems | 1994-09-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4285930 | 1994-08-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4295607 | 1994-07-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4293996 | 1994-06-30 | Paper |
| Periodic solutions of some planar non-autonomous polynomial differential | 1994-06-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4293991 | 1994-06-01 | Paper |
| A simple variational approach to a converse of the Lagrange-Dirichlet theorem | 1993-09-07 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4696538 | 1993-06-29 | Paper |
| Bifurcation from infinity and multiple solutions for some Dirichlet problems with unbounded nonlinearities | 1993-04-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4023466 | 1993-01-23 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4020655 | 1993-01-17 | Paper |
| Iterative and variational methods for the solvability of some semilinear equations in Hilbert spaces | 1993-01-16 | Paper |
| On some conditions for existence of forced periodic oscillations | 1993-01-16 | Paper |
| An integral defined by approximating $BV$ partitions of unity | 1993-01-16 | Paper |
| Twenty years of ordinary differential equations through twelve Oberwolfach meetings | 1992-09-27 | Paper |
| Critical point theory and Hamiltonian systems | 1992-09-17 | Paper |
| The periodic-Dirichlet problem for some semilinear wave equations | 1992-08-13 | Paper |
| Continuation Theorems for Periodic Perturbations of Autonomous Systems | 1992-06-28 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3974740 | 1992-06-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3975204 | 1992-06-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3976001 | 1992-06-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3982736 | 1992-06-26 | Paper |
| Generic results for the existence of nondegenerate periodic solutions of some differential systems with periodic nonlinearities | 1992-06-25 | Paper |
| Landesman-Lazer type problems at an eigenvalue of odd multiplicity | 1992-06-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3971479 | 1992-06-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3972649 | 1992-06-25 | Paper |
| The Leray-Schauder degree of \(S^ 1\)-equivariant operators associated to autonomous neutral equations in spaces of periodic functions | 1991-01-01 | Paper |
| Nonlinear eigenvalue problems with the parameter near resonance | 1990-01-01 | Paper |
| A continuation approach to superlinear periodic boundary value problems | 1990-01-01 | Paper |
| A variational approach to a nonlinear Steklov problem | 1990-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5749609 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3198157 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3201827 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3475576 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3478370 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3483582 | 1989-01-01 | Paper |
| Forced second order conservative systems with periodic nonlinearity | 1989-01-01 | Paper |
| Quadratic forms, weighted eigenfunctions and boundary value problems for non-linear second order ordinary differential equations | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4204434 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3026949 | 1988-01-01 | Paper |
| The forced pendulum: A paradigm for nonlinear analysis and dynamical systems | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3834335 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3834360 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3762900 | 1987-01-01 | Paper |
| First order ordinary differential equations with several periodic solutions | 1987-01-01 | Paper |
| Generalized Ambrosetti-Prodi conditions for nonlinear two-point boundary value problems | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3787011 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3791764 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3792992 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3795986 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3819371 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3831552 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4727067 | 1986-01-01 | Paper |
| A Multiplicity Result for Periodic Solutions of Forced Nonlinear Second order Ordinary Differential Equations | 1986-01-01 | Paper |
| Nonstandard analysis and generalized Riemann integrals | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3740675 | 1986-01-01 | Paper |
| Variational methods and semilinear elliptic equations | 1986-01-01 | Paper |
| Critical points of convex perturbations of some indefinite quadratic forms and semilinear boundary value problems at resonance | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3763143 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5185183 | 1985-01-01 | Paper |
| Necessary and Sufficient Conditions for the Solvability of a Nonlinear Two-Point Boundary Value Problem | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3726600 | 1985-01-01 | Paper |
| Corrigendum: Upper and lower solutions and semilinear second order elliptic equations with non-linear boundary conditions | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3729363 | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3742366 | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5187549 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3338580 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3676486 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3681173 | 1984-01-01 | Paper |
| Upper and lower solutions and semilinear second order elliptic equations with non-linear boundary conditions | 1984-01-01 | Paper |
| Multiple solutions of the periodic boundary value problem for some forced pendulum-type equations | 1984-01-01 | Paper |
| Asymptotic conditions at the two first eigenvalues for the periodic solutions of Liénard differential equations and an inequality of E. Schmidt | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3774176 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3797605 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4745772 | 1983-01-01 | Paper |
| Periodic solutions of some forced Liénard differential equations at resonance | 1983-01-01 | Paper |
| Asymptotic nonuniform nonresonance conditions in the periodic-Dirichlet problem for semi-linear wave equations | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3319071 | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3329763 | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3665468 | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3732416 | 1982-01-01 | Paper |
| Nonuniform nonresonance conditions at the two first eigenvalues for periodic solutions of forced Liénard and Duffing equations | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5187481 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5187482 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3733224 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3738119 | 1981-01-01 | Paper |
| Conservative systems of semi-linear wave equations with periodic Dirichlet boundary conditions | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3904802 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3918440 | 1981-01-01 | Paper |
| Nonresonance and existence for nonlinear elliptic boundary value problems | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3933507 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3940115 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3940157 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3948621 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3961793 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3962049 | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3966464 | 1981-01-01 | Paper |
| Two point boundary value problems for nonlinear second order differential equations in Hilbert spaces | 1980-01-01 | Paper |
| Docent Svatopluk Fučík has died | 1980-01-01 | Paper |
| News and Notices. In memoriam Professor Svatopluk Fučík | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3871198 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3890165 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3891287 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3900393 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3902055 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3903209 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3966673 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3049152 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3852569 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3887697 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3894277 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3915523 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4195252 | 1979-01-01 | Paper |
| Periodic solutions of ordinary differential equations with one-sided growth restrictions | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3852525 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3882795 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3903401 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3908083 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3913949 | 1978-01-01 | Paper |
| Generalized periodic solutions of nonlinear telegraph equations | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4180838 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3338656 | 1977-01-01 | Paper |
| Ordinary differential equations with nonlinear boundary conditions | 1977-01-01 | Paper |
| Coincidence degree, and nonlinear differential equations | 1977-01-01 | Paper |
| Multiplicity, Leray-Schauder formula, and bifurcation | 1977-01-01 | Paper |
| Stable homotopy and ordinary differential equations with nonlinear boundary conditions | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3876542 | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3888026 | 1977-01-01 | Paper |
| Rothe and altman type coincidence theorems and applications to differential equations | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4135878 | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4147008 | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4153113 | 1977-01-01 | Paper |
| Fredholm mappings and solutions of linear differential equations at singular points | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4101031 | 1976-01-01 | Paper |
| Coincidence Index and Multiplicity | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4102228 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4123887 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4129112 | 1976-01-01 | Paper |
| Periodic solutions of some nonlinear differential equations of higher order | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4084035 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4084036 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4090678 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4095448 | 1975-01-01 | Paper |
| Boundary value problems for nonlinear second-order vector differential equations | 1974-01-01 | Paper |
| The solvability of some operator equations with a quasi-bounded nonlinearity in normed spaces | 1974-01-01 | Paper |
| Coincidence degree and periodic solutions of neutral equations | 1974-01-01 | Paper |
| Periodic solutions of some vector retarded functional differential equations | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4067420 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4100776 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4777660 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5665796 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5682655 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5682706 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4067419 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4765151 | 1972-01-01 | Paper |
| Equivalence theorems for nonlinear operator equations and coincidence degree theory for some mappings in locally convex topological vector spaces | 1972-01-01 | Paper |
| An extension of a theorem of A. C. Lazer on forced nonlinear oscillations | 1972-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5644652 | 1971-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5644653 | 1971-01-01 | Paper |
| Periodic solutions of nonlinear functional differential equations | 1971-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5603535 | 1970-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5614848 | 1970-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5654399 | 1970-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5676050 | 1970-01-01 | Paper |
| Une généralisation de théorèmes de J. A. Marlin | 1970-01-01 | Paper |
| Existence of periodic solutions for higher-order differential systems that are not of class D | 1970-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5580500 | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5587897 | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5532765 | 1967-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5543606 | 1967-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5543607 | 1967-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5339520 | 1965-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5339521 | 1965-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5510226 | 1964-01-01 | Paper |
