TY  - JOUR
AU  - Patricio L. Felmer
TI  - Subharmonics near an equilibrium point for Hamiltonian systems.
JO  - Manuscripta mathematica
PY  - 1990
SP  - 359
EP  - 396
VL  - 66
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1990__66_1_155480/
ID  - MM2_1990__66_1_155480
ER  -