@article{AIHPC_1987__4_3_275_0,
     author = {Ambrosetti, Antonio and Coti Zelati, Vittorio},
     title = {Solutions with minimal period for hamiltonian systems in a potential well},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {275--296},
     publisher = {Gauthier-Villars},
     volume = {4},
     number = {3},
     year = {1987},
     mrnumber = {898050},
     zbl = {0623.58013},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPC_1987__4_3_275_0/}
}