Hyperbolic behavior of dynamical systems. Foreword
Annales de l'I.H.P. Physique théorique, Tome 53 (1990) no. 4, p. 359. 
@article{AIHPA_1990__53_4_359_0,
     author = {Collet, P. and Ledrappier, F.},
     title = {Hyperbolic behavior of dynamical systems. {Foreword}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {359--359},
     publisher = {Gauthier-Villars},
     volume = {53},
     number = {4},
     year = {1990},
     mrnumber = {1096097},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1990__53_4_359_0/}
}
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Collet, P.; Ledrappier, F. Hyperbolic behavior of dynamical systems. Foreword. Annales de l'I.H.P. Physique théorique, Tome 53 (1990) no. 4, p. 359. http://www.numdam.org/item/AIHPA_1990__53_4_359_0/