no. 1
Geodesics on product lorentzian manifolds
Annales de l'I.H.P. Analyse non linéaire, Tome 12 (1995) no. 1, pp. 27-60 
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     author = {Giannoni, F. and Masiello, A.},
     title = {Geodesics on product lorentzian manifolds},
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     pages = {27--60},
     year = {1995},
     publisher = {Gauthier-Villars},
     volume = {12},
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     mrnumber = {1320567},
     zbl = {0839.53046},
     language = {en},
     url = {https://www.numdam.org/item/AIHPC_1995__12_1_27_0/}
}
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Giannoni, F.; Masiello, A. Geodesics on product lorentzian manifolds. Annales de l'I.H.P. Analyse non linéaire, Tome 12 (1995) no. 1, pp. 27-60. https://www.numdam.org/item/AIHPC_1995__12_1_27_0/

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