TY  - JOUR
AU  - O. M. Penkin
TI  - On the maximum principle for an elliptic equation on a
JO  - Doklady Akademii Nauk
PY  - 1997
SP  - 462
EP  - 465
VL  - 352
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1997_352_4_a6/
LA  - ru
ID  - DAN_1997_352_4_a6
ER  -