TY  - JOUR
AU  - Mava-Un, J.
TI  - Forced second order conservative systems with periodic nonlinearity
JO  - Annales de l'I.H.P. Analyse non linéaire
PY  - 1989
SP  - 415
EP  - 434
VL  - S6
PB  - Gauthier-Villars
UR  - http://archive.numdam.org/item/AIHPC_1989__S6__415_0/
LA  - en
ID  - AIHPC_1989__S6__415_0
ER  -