@article{AFST_1991_5_12_1_37_0,
     author = {Canino, Annamaria},
     title = {Periodic solutions of quadratic lagrangian systems on $p$-convex sets},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {37--60},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {Ser. 5, 12},
     number = {1},
     year = {1991},
     mrnumber = {1189433},
     zbl = {0773.49004},
     language = {en},
     url = {http://www.numdam.org/item/AFST_1991_5_12_1_37_0/}
}