| Publication | Date of Publication | Type |
|---|
| Knots | 2013-08-14 | Paper |
| On intersections of closed curves on surfaces | 2011-11-22 | Paper |
| Some quadratic equations in the free group of rank 2 | 2008-05-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5385325 | 2008-05-05 | Paper |
| Minimal number of preimages under maps of surfaces | 2007-03-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3409141 | 2006-11-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5290130 | 2006-04-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3372382 | 2006-02-20 | Paper |
| Simple curves on surfaces and an analog of a theorem of Magnus for surface groups. | 2005-02-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4818702 | 2004-10-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4475032 | 2004-07-22 | Paper |
| Realization of primitive branched coverings over closed surfaces following the Hurwitz approach | 2004-01-27 | Paper |
| On the cohomology of Seifert and graph manifolds | 2003-04-28 | Paper |
| Knots. | 2003-02-02 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3147481 | 2003-01-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4549534 | 2002-11-13 | Paper |
| Computer Calculation of the Degree of Maps into the Poincare Homology Sphere | 2002-09-12 | Paper |
| Roots of mappings on nonorientable surfaces and equations in free groups | 2002-06-17 | Paper |
| Any 3-manifold 1-dominates at most finitely many 3-manifolds of đÂł-geometry | 2002-06-17 | Paper |
| Composites of open maps | 2002-01-01 | Paper |
| The minimal number of roots of surface mappings and quadratic equations in free groups | 2001-11-06 | Paper |
| Equations in free groups and coincidence of mappings on surfaces | 2001-10-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2736067 | 2001-08-28 | Paper |
| The cohomology ring of a class of Seifert manifolds | 2001-03-04 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4946173 | 2000-09-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4244971 | 2000-01-23 | Paper |
| L'anneau de cohomologie d'une variété de Seifert | 1998-07-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4385500 | 1998-04-15 | Paper |
| Minimal Seifert manifolds | 1997-12-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3123514 | 1997-07-20 | Paper |
| Degree-one maps onto lens spaces | 1997-06-23 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2785497 | 1997-02-24 | Paper |
| Primitive elements in the free product of two finite cyclic groups | 1996-09-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4698535 | 1995-05-09 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4280851 | 1994-02-24 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4278192 | 1994-01-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4039963 | 1993-06-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4040559 | 1993-06-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4027283 | 1993-02-21 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4016464 | 1993-01-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3971685 | 1992-06-25 | Paper |
| Genus 2 Heegaard decompositions of small Seifert manifolds | 1991-01-01 | Paper |
| A TOPOLOGICAL INVARIANT AND A CRITERION FOR THE EQUIVALENCE OF INTEGRABLE HAMILTONIAN SYSTEMS WITH TWO DEGREES OF FREEDOM | 1991-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3485631 | 1990-01-01 | Paper |
| ON TYPICAL TOPOLOGICAL PROPERTIES OF INTEGRABLE HAMILTONIAN SYSTEMS | 1989-01-01 | Paper |
| On Heegaard decompositions of torus knot exteriors and related Seifert fibre spaces | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3791929 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3805473 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3828737 | 1988-01-01 | Paper |
| A presentation for the stabilizer of an element in a free product | 1987-01-01 | Paper |
| On the Nielsen method in free products with amalgamated subgroups | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3361570 | 1987-01-01 | Paper |
| Meridional Generators and Plat Presentations of Torus Links | 1987-01-01 | Paper |
| MINIMAL GEODESICS OF A TORUS WITH A HOLE | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3796398 | 1987-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3729690 | 1986-01-01 | Paper |
| Knots | 1985-01-01 | Paper |
| Nombre de ponts et générateurs méridiens des entrelacs de Montesinos | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3704622 | 1985-01-01 | Paper |
| On subgroups of a free product of cyclic groups | 1984-01-01 | Paper |
| Rescuing the Whitehead method for free products. I: Peak reduction | 1984-01-01 | Paper |
| Heegaard genus of closed orientable Seifert 3-manifolds | 1984-01-01 | Paper |
| Rescuing the Whitehead method for free products. II: The algorithm | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3219469 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3337638 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3314043 | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3322865 | 1983-01-01 | Paper |
| Ăber Erweiterungen von Z und \(Z_ 2*Z_ 2\) durch nichteuklidische kristallographische Gruppen | 1982-01-01 | Paper |
| Primitives in the free group on two generators | 1981-01-01 | Paper |
| Finite groups of mapping classes of surfaces | 1981-01-01 | Paper |
| On decompositions of discrete groups of motions of the plane | 1981-01-01 | Paper |
| Surfaces and planar discontinuous groups. Revised and expanded transl. from the German by J. Stillwell | 1980-01-01 | Paper |
| On coverings of Seifert 3-manifolds | 1979-01-01 | Paper |
| Order reduced Reidemeister-Schreier subgroup presentations and applications | 1979-01-01 | Paper |
| Endliche Gruppen von Abbildungsklassen gefaserter 3-Mannigfaltigkeiten | 1979-01-01 | Paper |
| Unteralgebren von \(\mathfrak {lf}(2,\mathbb{R})\) und Untergruppen von \(LF(2,\mathbb{R})\) | 1978-01-01 | Paper |
| Generators of the free product with amalgamation of two infinite cyclic groups | 1977-01-01 | Paper |
| On decompositions of discontinuous groups of the plane | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4081478 | 1976-01-01 | Paper |
| ON TRIANGLE GROUPS | 1976-01-01 | Paper |
| Ergodische Eigenschaften der Automorphismen p-adischer Zahlen | 1975-01-01 | Paper |
| Ăber Erzeugende ebener diskontinuierlicher Gruppen | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4063637 | 1974-01-01 | Paper |
| Addendum to: âOn extensions of fundamental groups of surfaces and related groupsâ | 1974-01-01 | Paper |
| Lifting and projecting homeomorphisms | 1973-01-01 | Paper |
| Lifting and projecting homeomorphisms | 1973-01-01 | Paper |
| On the homeotopy groups of surfaces | 1973-01-01 | Paper |
| On extensions of fundamental groups of surfaces and related groups | 1971-01-01 | Paper |
| On extensions of fundamental groups of surfaces and related groups | 1971-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5602675 | 1970-01-01 | Paper |
| On simple systems of paths on complete pretzels | 1970-01-01 | Paper |
| Ăber die Nielsensche KĂŒrzungsmethode in freien Produkten mit Amalgam | 1970-01-01 | Paper |
| FlÀchen und ebene diskontinuierliche Gruppen | 1970-01-01 | Paper |
| On toric fiberings over surfaces | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5565625 | 1969-01-01 | Paper |
| Algorithmen fĂŒr einfache Kurven auf FlĂ€chen II. | 1969-01-01 | Paper |
| A topological classification of certain 3-manifolds | 1968-01-01 | Paper |
| Zur Topologie gefaserter dreidimensionaler Mannigfaltigkeiten | 1967-01-01 | Paper |
| Neuwirtsche Knoten und FlÀchenabbildungen | 1967-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4065761 | 1967-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5662132 | 1966-01-01 | Paper |
| Curves on 2-manifolds: A counterexample | 1966-01-01 | Paper |
| Eine Kennzeichnung der Torusknoten | 1966-01-01 | Paper |
| Ăber Automorphismen ebener diskontinuierlicher Gruppen | 1966-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5598908 | 1965-01-01 | Paper |
| Alternierende Produkte in freien Gruppen. II | 1965-01-01 | Paper |
| Algorithmen fĂŒr einfache Kurven auf FlĂ€chen. | 1965-01-01 | Paper |
| Alternierende Produkte in freien Gruppen | 1964-01-01 | Paper |
| Ăber einfache Kurvensysteme auf einer Vollbrezel vom Geschlecht 2 | 1964-01-01 | Paper |
| Ăber die schwache Konvergenz der Haarschen MaĂe von Untergruppen | 1964-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5530459 | 1964-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5342982 | 1963-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5530457 | 1963-01-01 | Paper |
| Ăber Worte \(S_1^{a_1}, S_2^{a_2}, \ldots, S_q^{a_q}\) in einer freien Gruppe mit \(p\) freien Erzeugenden | 1962-01-01 | Paper |
| Ăber einfache Kurven auf Vollbrezeln | 1962-01-01 | Paper |
