TY  - JOUR
AU  - E. S. Gubanova
TI  - A problem in the theory of second-order elliptic equations in the plane
JO  - Differencialʹnye uravneniâ
PY  - 1986
SP  - 1609
EP  - 1610
VL  - 22
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1986_22_9_a17/
LA  - ru
ID  - DE_1986_22_9_a17
ER  -