| Publication | Date of Publication | Type |
|---|
| https://portal.mardi4nfdi.de/entity/Q4971227 | 2020-10-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3533405 | 2008-10-23 | Paper |
| MULTIPLE POSITIVE SOLUTIONS OF A ONE-DIMENSIONAL PRESCRIBED MEAN CURVATURE PROBLEM | 2008-05-14 | Paper |
| A monotone method for fourth order value problems involving a factorizable linear operator | 2008-03-06 | Paper |
| Classical and non-classical solutions of a prescribed curvature equation | 2007-12-21 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5428452 | 2007-11-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5489619 | 2006-09-28 | Paper |
| Two-point boundary value problems. Lower and upper solutions | 2006-05-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5703730 | 2005-11-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5698927 | 2005-10-20 | Paper |
| Multiple positive solutions of superlinear elliptic problems with sign-changing weight | 2005-08-01 | Paper |
| A Seven-Positive-Solutions Theorem for a Superlinear Problem | 2004-10-25 | Paper |
| Degree computations for positively homogeneous differential equations | 2004-10-01 | Paper |
| An existence result for first order periodic problems with discontinuous and singular nonlinearities. | 2004-08-26 | Paper |
| Positive Solutions of an Indefinite Prescribed Mean Curvature Problem on a General Domain | 2004-05-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4462605 | 2004-05-18 | Paper |
| Positive solutions of superlinear boundary value problems with singular indefinite weight | 2004-03-08 | Paper |
| Positive solutions of singular boundary value problems with indefinite weight | 2004-02-03 | Paper |
| Examples of the nonexistence of a solution in the presence of upper and lower solutions | 2003-10-12 | Paper |
| Existence and Multiplicity of Positive Solutions for a Dirichlet Boundary Value Problem in ℝ2 | 2003-09-17 | Paper |
| A constructive monotone iterative method for second-order BVP in the presence of lower and upper solutions | 2003-01-28 | Paper |
| Monotone iterative methods for boundary value problems | 2003-01-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2756182 | 2002-12-10 | Paper |
| Optimal existence conditions for \(\varphi\)-Laplacian equations with upper and lower solutions in the reversed order | 2002-11-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2764201 | 2002-01-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4762821 | 2001-09-25 | Paper |
| Existence and multiplicity of positive solutions for boundary value problems of 2D order ODE | 2001-07-17 | Paper |
| Monotone method for the Neumann problem with lower and upper solutions in the reverse order | 2001-04-25 | Paper |
| Existence and multiplicity of positive solutions to the Ginzburg-Landau boundary value problem | 2001-03-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4948943 | 2000-04-27 | Paper |
| Multiple periodic solutions for problems at resonance with arbitrary eigenvalues | 2000-02-23 | Paper |
| Nonselfadjoint 4th order boundary value problems | 2000-02-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4233691 | 1999-11-29 | Paper |
| Existence and localization of solutions of second order elliptic problems using lower and upper solutions in the reversed order | 1998-10-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4347835 | 1998-05-29 | Paper |
| Multiplicity results for boundary value problems with potentials oscillating around resonance | 1998-05-25 | Paper |
| A Two-Point Problem with Nonlinearity Depending Only on the Derivative | 1998-02-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4718496 | 1997-11-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4718490 | 1997-09-24 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4892386 | 1997-03-31 | Paper |
| Nonresonance conditions on the potential with respect to the Fučik spectrum for the periodic boundary value problem | 1996-12-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858603 | 1996-11-07 | Paper |
| On pairs of positive solutions for a singular boundary value | 1996-10-08 | Paper |
| Fučík spectrum for a third order equation | 1996-09-18 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4855737 | 1996-07-18 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858611 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861149 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861171 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861191 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4861202 | 1996-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4858610 | 1996-02-01 | Paper |
| A nonlinear boundary value problem with potential oscillating around the first eigenvalue | 1995-10-03 | Paper |
| Upper and lower solutions for a generalized Emden-Fowler equation | 1994-06-16 | Paper |
| Periodic solutions of second order differential equations with superlinear asymmetric nonlinearities | 1993-11-17 | Paper |
| Jumping nonlinearities for neumann BVPs with positive forcing | 1993-06-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3975214 | 1992-06-26 | Paper |
| An abstract approach to a class of nonlinear boundary value problems | 1992-06-25 | Paper |
| Periodic solutions of dissipative dynamical systems with singular potentials | 1990-01-01 | Paper |
| Periodic Solutions of some Lienard Equations with Singularities | 1990-01-01 | Paper |
| Periodic solutions of asymptotically positively homogeneous differential equations | 1989-01-01 | Paper |
| Existence of periodic solutions of Duffing equations | 1989-01-01 | Paper |
| On periodic solutions of nonlinear second order vector differential equations | 1986-01-01 | Paper |
| Upper and lower solutions for second-order boundary value problems with nonlinear boundary conditions | 1986-01-01 | Paper |
| Nonlinear boundary value problems for systems of differential equations | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3039177 | 1983-01-01 | Paper |
| The Picard boundary value problem for nonlinear second order vector differential equations | 1981-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3937721 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3964891 | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3858615 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3884436 | 1978-01-01 | Paper |
| On relaxation oscillations in a forced van der Pol oscillator | 1978-01-01 | Paper |
| Stability theory by Liapunov's direct method | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4125173 | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4135901 | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4130417 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4072159 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4080020 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4061303 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4157046 | 1974-01-01 | Paper |
| A Consistency Theory of Singular Perturbations of Differential Equations | 1974-01-01 | Paper |
| Classification of stability-like concepts and their study using vector Lyapunov functions | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5685443 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4112262 | 1972-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4768058 | 1972-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5654420 | 1971-01-01 | Paper |
