TY  - JOUR
AU  - N. A. Izobov
TI  - On a set of lower indices of a linear differential system
JO  - Differencialʹnye uravneniâ
PY  - 1965
SP  - 469
EP  - 477
VL  - 1
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1965_1_4_a6/
LA  - ru
ID  - DE_1965_1_4_a6
ER  -