TY  - JOUR
AU  - A. G. Kostyuchenko
TI  - Some spectral properties of differential operators
JO  - Matematičeskie zametki
PY  - 1967
SP  - 365
EP  - 378
VL  - 1
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1967_1_3_a15/
LA  - ru
ID  - MZM_1967_1_3_a15
ER  -