TY  - JOUR
AU  - A. A. Levakov
TI  - On the controllability of linear nonstationary systems
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 798
EP  - 806
VL  - 23
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_5_a7/
LA  - ru
ID  - DE_1987_23_5_a7
ER  -