TY  - JOUR
AU  - A. N. Kochubei
TI  - Nonselfadjoint abstract differential operators with discrete spectrum
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1601
EP  - 1608
VL  - 9
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_9_a5/
LA  - ru
ID  - DE_1973_9_9_a5
ER  -