TY  - JOUR
AU  - Li Xiao
TI  - Existence of Periodic Solutions for Second Order Hamiltonian System
JO  - Bulletin of the Malaysian Mathematical Society
PY  - 2012
VL  - 35
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/BMMS_2012_35_3_a16/
ID  - BMMS_2012_35_3_a16
ER  -