Polyfold and Fredholm TheoryHelmut Hofer, Krzysztof Wysocki, Eduard Zehnder · First published 2021Open the Tome
Symplectic invariants and Hamiltonian dynamicsHelmut Hofer, Eduard Zehnder · First published 1994Open the Tome
Analysis, et ceteraJürgen Moser, Paul H. Rabinowitz, Eduard Zehnder · First published 1990Open the Tome