%0 Journal Article
%A Bartsch, Thomas
%T A generalization of the Weinstein-Moser theorems on periodic orbits of a hamiltonian system near an equilibrium
%J Annales de l'I.H.P. Analyse non linéaire
%D 1997
%P 691-718
%V 14
%N 6
%I Gauthier-Villars
%U http://archive.numdam.org/item/AIHPC_1997__14_6_691_0/
%G en
%F AIHPC_1997__14_6_691_0