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
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM_2000_151_3_a1/
ID  - AM_2000_151_3_a1
ER  -