TY  - JOUR
AU  - Enrique R. Pujals
AU  - Martín Sambarino
TI  - Homoclinic tangencies and hyperbolicity for surface diffeomorphisms
JO  - Annals of mathematics
PY  - 2000
VL  - 151
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.2307/121127/
DO  - 10.2307/121127
ID  - 10_2307_121127
ER  -