TY  - JOUR
AU  - A. L. Skubachevskii
AU  - G. M. Steblov
TI  - On the spectrum of differential operators with a domain that is
JO  - Doklady Akademii Nauk
PY  - 1991
SP  - 1158
EP  - 1163
VL  - 321
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1991_321_6_a7/
LA  - ru
ID  - DAN_1991_321_6_a7
ER  -