@article{ASNSP_2004_5_3_1_87_0,
     author = {Berti, Massimiliano and Biasco, Luca and Valdinoci, Enrico},
     title = {Periodic orbits close to elliptic tori and applications to the three-body problem},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {87--138},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 3},
     number = {1},
     year = {2004},
     mrnumber = {2064969},
     zbl = {1121.37047},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_2004_5_3_1_87_0/}
}