%0 Journal Article
%A Mava-Un, J.
%T Forced second order conservative systems with periodic nonlinearity
%J Annales de l'I.H.P. Analyse non linéaire
%D 1989
%P 415-434
%V S6
%I Gauthier-Villars
%U http://archive.numdam.org/item/AIHPC_1989__S6__415_0/
%G en
%F AIHPC_1989__S6__415_0