TY  - JOUR
AU  - S. M. Ponomarev
TI  - A generalization of the theorem of M.\,V.~Keldy{\v s} on the completeness of the eigen- and associated functions of the first boundary value problem for a nonselfadjoint elliptic operator
JO  - Differencialʹnye uravneniâ
PY  - 1974
SP  - 2294
EP  - 2296
VL  - 10
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1974_10_12_a20/
LA  - ru
ID  - DE_1974_10_12_a20
ER  -