%0 Journal Article %A Ambrosetti, A. %A Coti Zelati, V. %T Addendum to 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 337-338 %V 9 %N 3 %I Gauthier-Villars %U http://archive.numdam.org/item/AIHPC_1992__9_3_337_0/ %G en %F AIHPC_1992__9_3_337_0