TY  - JOUR
AU  - Zhang, Xingyong
AU  - Zhou, Yinggao
TI  - On periodic solutions of non-autonomous second order Hamiltonian systems
JO  - Applications of Mathematics
PY  - 2010
SP  - 373
EP  - 384
VL  - 55
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1007/s10492-010-0013-9/
DO  - 10.1007/s10492-010-0013-9
LA  - en
ID  - 10_1007_s10492_010_0013_9
ER  -