TY  - JOUR
AU  - N. N. Petrov
TI  - Certain questions of the control theory in the plane
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1058
EP  - 1067
VL  - 9
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_6_a7/
LA  - ru
ID  - DE_1973_9_6_a7
ER  -