TY  - BOOK
AU  - Hofer, Helmut
AU  - Zehnder, Eduard.
TI  - Symplectic invariants and Hamiltonian dynamics
T2  - Birkhauser Advanced texts
SN  - 9783034801034
U1  - 512.52 
PY  - 1994///
CY  - New York
PB  - Springer
ER  -