TY  - JOUR
AU  - N. A. Zhikhar
TI  - Certain properties of differential operators with variable coefficients that depend on the form of the domain
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 645
EP  - 651
VL  - 8
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_4_a8/
LA  - ru
ID  - DE_1972_8_4_a8
ER  -