@article{AIHPC_1994__11_6_643_0,
     author = {D{\'\i}az, Lorenzo J. and Ures, Ra\'ul},
     title = {Persistent homoclinic tangencies and the unfolding of cycles},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {643--659},
     publisher = {Gauthier-Villars},
     volume = {11},
     number = {6},
     year = {1994},
     mrnumber = {1310626},
     zbl = {0834.58034},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1994__11_6_643_0/}
}