TY  - JOUR
AU  - Yiming Long
TI  - Periodic Solutions of Superquadratic Hamiltonian Systems with Bounded Forcing Terms.
JO  - Mathematische Zeitschrift
PY  - 1990
SP  - 453
EP  - 468
VL  - 203
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1990__203_3_174140/
ID  - MZ_1990__203_3_174140
ER  -