TY  - JOUR
AU  - A. I. Kalinin
TI  - Necessary optimality conditions for singular controls
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 568
EP  - 573
VL  - 9
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_3_a25/
LA  - ru
ID  - DE_1973_9_3_a25
ER  -