TY  - DATA
AU  - Karshon, Yael
TI  - Periodic Hamiltonian flows on four dimensional manifolds 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470402631 (online)
PY  - 1999///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0672
ER  -