%0 Journal Article %A Ambrosetti, Antonio %A Coti Zelati, Vittorio %T Solutions with minimal period for hamiltonian systems in a potential well %J Annales de l'I.H.P. Analyse non linéaire %D 1987 %P 275-296 %V 4 %N 3 %I Gauthier-Villars %G en %F AIHPC_1987__4_3_275_0