TY - JOUR AU - Coti Zelati, Vittorio TI - Periodic solutions for N-body type problems JO - Annales de l'I.H.P. Analyse non linéaire PY - 1990 DA - 1990/// SP - 477 EP - 492 VL - 7 IS - 5 PB - Gauthier-Villars UR - http://archive.numdam.org/item/AIHPC_1990__7_5_477_0/ UR - https://zbmath.org/?q=an%3A0723.70010 UR - https://www.ams.org/mathscinet-getitem?mr=1138534 LA - en ID - AIHPC_1990__7_5_477_0 ER -