%0 Journal Article
%A Ambrosetti, A.
%A Coti-Zelati, V.
%T Closed orbits of fixed energy for a class of N-body problems
%J Annales de l'I.H.P. Analyse non linéaire
%D 1992
%P 187-200
%V 9
%N 2
%I Gauthier-Villars
%U http://archive.numdam.org/item/AIHPC_1992__9_2_187_0/
%G en
%F AIHPC_1992__9_2_187_0