MLA

Hofer, Helmut, and Eduard Zehnder. Symplectic Invariants and Hamiltonian Dynamics. Springer Basel, 2011.

APA

Hofer, H., & Zehnder, E. (2011). Symplectic Invariants and Hamiltonian Dynamics. Springer Basel.

Chicago

Hofer, Helmut, and Eduard Zehnder. Symplectic Invariants and Hamiltonian Dynamics. : Springer Basel, 2011.