TY  - JOUR
AU  - N. N. Petrov
TI  - The boundary of the set of controllability of plane holomorphic systems
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1618
EP  - 1626
VL  - 9
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_9_a7/
LA  - ru
ID  - DE_1973_9_9_a7
ER  -