no. 6
Periodic solutions of hamiltonian systems of 3-body type
Annales de l'I.H.P. Analyse non linéaire, Tome 8 (1991) no. 6, pp. 561-649. 
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     author = {Bahri, A. and Rabinowitz, P. H.},
     title = {Periodic solutions of hamiltonian systems of 3-body type},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {561--649},
     publisher = {Gauthier-Villars},
     volume = {8},
     number = {6},
     year = {1991},
     mrnumber = {1145561},
     zbl = {0745.34034},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1991__8_6_561_0/}
}
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Bahri, A.; Rabinowitz, P. H. Periodic solutions of hamiltonian systems of 3-body type. Annales de l'I.H.P. Analyse non linéaire, Tome 8 (1991) no. 6, pp. 561-649. http://www.numdam.org/item/AIHPC_1991__8_6_561_0/

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