TY  - JOUR
AU  - A. P. Oskolkov
TI  - Prior estimates of first derivatives for two-dimensional linear strongly elliptic systems and elliptic mappings
JO  - Informatics and Automation
PY  - 1966
SP  - 182
EP  - 191
VL  - 92
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1966_92_a11/
LA  - ru
ID  - TRSPY_1966_92_a11
ER  -