no. 1
On the existence of multiple geodesics in static space-times
Annales de l'I.H.P. Analyse non linéaire, Tome 8 (1991) no. 1, pp. 79-102 
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     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},
     year = {1991},
     publisher = {Gauthier-Villars},
     volume = {8},
     number = {1},
     mrnumber = {1094653},
     zbl = {0716.53057},
     language = {en},
     url = {https://www.numdam.org/item/AIHPC_1991__8_1_79_0/}
}
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Benci, V.; Fortunato, D.; Giannoni, F. On the existence of multiple geodesics in static space-times. Annales de l'I.H.P. Analyse non linéaire, Tome 8 (1991) no. 1, pp. 79-102. https://www.numdam.org/item/AIHPC_1991__8_1_79_0/

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