@article{AIHPC_1994__11_6_613_0, author = {Ambrosetti, Antonio and Tanaka, Kazunaga and Vitillaro, Enzo}, title = {Periodic solutions with prescribed energy for some keplerian $N$-body problems}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {613--632}, publisher = {Gauthier-Villars}, volume = {11}, number = {6}, year = {1994}, zbl = {0855.70006}, mrnumber = {1310624}, language = {en}, url = {http://archive.numdam.org/item/AIHPC_1994__11_6_613_0/} }