The Birkhoff-Lewis Fixed Point Theorem and a Conjecture of V.I. Arnold. C.C. Conley; E. Zehnder — 1983 Inventiones mathematicae
Periodic Solutions on hypersurfaces and a result by C. Viterbo. H. Hofer; E. Zehnder — 1987 Inventiones mathematicae
On the Numerical Treatment of a Small Divisor Problem. E. Zehnder; D. Braess — 1982 Numerische Mathematik
Boundedness of solutions via the twist-theorem R. Dieckerhoff; E. Zehnder — 1987 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Asymptotic expansions of quasiperiodic solutions L. Chierchia; E. Zehnder — 1989 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Nontrivial solutions for a class of nonresonance problems and applications to nonlinear differential equations H. Amann; E. Zehnder — 1980 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Properties of Pseudo-holomorphic Curves in Symplectisations II: Embedding Controls and Algebraic Invariants. H. Hofer; K. Wysocki; E. Zehnder — 1995 Geometric and functional analysis
Properties of pseudoholomorphic curves in symplectisations. I : asymptotics H. Hofer; K. Wysocki; E. Zehnder — 1996 Annales de l'I.H.P. Analyse non linéaire
Correction to “Properties of pseudoholomorphic curves in symplectisations. I : asymptotics” H. Hofer; K. Wysocki; E. Zehnder — 1998 Annales de l'I.H.P. Analyse non linéaire
Compactness results in symplectic field theory. Bourgeois, F.; Eliashberg, Y.; Hofer, H.; Wysocki, K.; Zehnder, E. — 2003 Geometry & Topology