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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     title = {On the existence of multiple geodesics in static space-times},
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     pages = {79--102},
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     volume = {8},
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     year = {1991},
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     zbl = {0716.53057},
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     url = {http://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. http://www.numdam.org/item/AIHPC_1991__8_1_79_0/

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