TY  - JOUR
AU  - Jens Frehse
TI  - On Two-Dimensional Quasi-Linear Elliptic Systems.
JO  - Manuscripta mathematica
PY  - 1979
SP  - 21
EP  - 50
VL  - 28
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1979__28_154627/
ID  - MM2_1979__28_154627
ER  -