TY  - JOUR
AU  - Konrad Gröger
TI  - A W1,p-Estimate for Solutions to Mixed Boundary Value Problems for Second Order Elliptic Differential Equtions.
JO  - Mathematische Annalen
PY  - 1989
SP  - 679
EP  - 688
VL  - 283
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164533/
ID  - MAN_1989__283_1_164533
ER  -