TY  - JOUR
AU  - Frédéric Hélein
TI  - Approximations of Sobolev maps between an open set and an Euclidean sphere, boundary data, and singularities.
JO  - Mathematische Annalen
PY  - 1989
SP  - 125
EP  - 140
VL  - 285
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164590/
ID  - MAN_1989__285_1_164590
ER  -