@article{AIHPC_1991__8_1_79_0,
     author = {Benci, V. and Fortunato, D. and Giannoni, F.},
     title = {On the existence of multiple geodesics in static space-times},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {79--102},
     publisher = {Gauthier-Villars},
     volume = {8},
     number = {1},
     year = {1991},
     mrnumber = {1094653},
     zbl = {0716.53057},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1991__8_1_79_0/}
}