TY  - JOUR
AU  - I. I. Golichev
TI  - Discreteness of the spectrum and completeness of systems of characteristic and associated vectors of second-order nonself-adjoint differential operators
JO  - Matematičeskie zametki
PY  - 1971
SP  - 401
EP  - 408
VL  - 9
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1971_9_4_a4/
LA  - ru
ID  - MZM_1971_9_4_a4
ER  -