@article{01529483,
title = {Homoclinic tangencies and hyperbolicity for surface diffeomorphisms.},
journal = {Annals of Mathematics. Second Series},
volume = {151},
year = {2000},
pages = {961-1023},
doi = {10.2307/121127},
zbl = {0959.37040},
language = {en},
url = {http://dml.mathdoc.fr/item/01529483}
}
Pujals, Enrique R.; Sambarino, Martín. Homoclinic tangencies and hyperbolicity for surface diffeomorphisms.. Annals of Mathematics. Second Series, Tome 151 (2000) pp. 961-1023. doi : 10.2307/121127. http://gdmltest.u-ga.fr/item/01529483/