%0 Journal Article
%A Chang, K. C.
%A Liu, J. Q.
%A Liu, M. J.
%T Nontrivial periodic solutions for strong resonance hamiltonian systems
%J Annales de l'I.H.P. Analyse non linéaire
%D 1997
%P 103-117
%V 14
%N 1
%I Gauthier-Villars
%U http://www.numdam.org/item/AIHPC_1997__14_1_103_0/
%G en
%F AIHPC_1997__14_1_103_0