TY  - JOUR
AU  - I. V. Gel'man
TI  - A certain characteristic of normally solvable extensions of a minimal operator
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 2274
EP  - 2275
VL  - 5
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_12_a15/
LA  - ru
ID  - DE_1969_5_12_a15
ER  -