TY  - JOUR
AU  - E. S. Gubanova
TI  - Some questions of the theory of second-order elliptic equations on the plane
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 618
EP  - 621
VL  - 19
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_4_a9/
LA  - ru
ID  - DE_1983_19_4_a9
ER  -