no. 2
Variational construction of homoclinics and chaos in presence of a saddle-saddle equilibrium
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 27 (1998) no. 2, pp. 331-377. 
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     title = {Variational construction of homoclinics and chaos in presence of a saddle-saddle equilibrium},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {331--377},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 27},
     number = {2},
     year = {1998},
     mrnumber = {1664692},
     zbl = {0938.34039},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1998_4_27_2_331_0/}
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Berti, Massimiliano; Bolle, Philippe. Variational construction of homoclinics and chaos in presence of a saddle-saddle equilibrium. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 27 (1998) no. 2, pp. 331-377. http://www.numdam.org/item/ASNSP_1998_4_27_2_331_0/

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