TY  - JOUR
AU  - M. I. Sumin
TI  - On the first variation in the theory of optimal control of systems with distributed parameters
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 2179
EP  - 2181
VL  - 27
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_12_a26/
LA  - ru
ID  - DE_1991_27_12_a26
ER  -