TY  - JOUR
AU  - Klaus Thews
TI  - T-Periodic Solutions of Time Dependent Hamiltonian Systems with a Potential Vanishing at Infinity.
JO  - Manuscripta mathematica
PY  - 1980
SP  - 327
EP  - 338
VL  - 33
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1980__33_154752/
ID  - MM2_1980__33_154752
ER  -