TY  - JOUR
AU  - O. D. Apyshev
AU  - M. Otelbaev
TI  - On the spectrum of a~class of differential operators and some imbedding theorems
JO  - Izvestiya. Mathematics 
PY  - 1980
SP  - 1
EP  - 24
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1980_15_1_a0/
LA  - en
ID  - IM2_1980_15_1_a0
ER  -