TY  - JOUR
AU  - I. S. Ovchinnikov
TI  - The existence of mappings on the plane for degenerate first order elliptic systems
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 526
EP  - 529
VL  - 191
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_191_3_a6/
LA  - ru
ID  - DAN_1970_191_3_a6
ER  -