@article{AIHPC_1998__15_5_623_0,
     author = {San Mart{\'\i}n, Bernardo},
     title = {Saddle-focus singular cycles and prevalence of hyperbolicity},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {623--649},
     publisher = {Gauthier-Villars},
     volume = {15},
     number = {5},
     year = {1998},
     mrnumber = {1643397},
     zbl = {0990.37020},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1998__15_5_623_0/}
}