TY  - JOUR
AU  - A. Dzhuraev
TI  - Degenerate elliptic and first-order mixed-type systems in a plane
JO  - Doklady Akademii Nauk
PY  - 1988
SP  - 1047
EP  - 1051
VL  - 298
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1988_298_5_a3/
LA  - ru
ID  - DAN_1988_298_5_a3
ER  -