@article{AIHPC_1990__7_5_477_0, author = {Coti Zelati, Vittorio}, title = {Periodic solutions for {N-body} type problems}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {477--492}, publisher = {Gauthier-Villars}, volume = {7}, number = {5}, year = {1990}, zbl = {0723.70010}, mrnumber = {1138534}, language = {en}, url = {http://archive.numdam.org/item/AIHPC_1990__7_5_477_0/} }