TY  - JOUR
AU  - M. Otelbaev
TI  - Letter to the editors: ``A criterion for discreteness of the spectrum for a degenerate operator, and certain imbedding theorems'' (Differencial'nye Uravnenija \textbf{13} (1977), no.~1, 111--120)
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 2288
VL  - 13
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_12_a21/
LA  - ru
ID  - DE_1977_13_12_a21
ER  -