TY  - JOUR
AU  - S. M. Dolganova
TI  - The summation of principal vector expansions of certain nonselfadjoint differential operators
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 518
EP  - 525
VL  - 4
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_3_a12/
LA  - ru
ID  - DE_1968_4_3_a12
ER  -