TY  - JOUR
AU  - N. N. Petrov
TI  - The minimum number of vector fields forming a control system with given properties
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 2063
EP  - 2068
VL  - 21
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_12_a5/
LA  - ru
ID  - DE_1985_21_12_a5
ER  -