TY  - JOUR
AU  - M. M. Khrustalev
TI  - Necessary and sufficient conditions for an optimal control problem
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 59
EP  - 62
VL  - 211
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_211_1_a13/
LA  - ru
ID  - DAN_1973_211_1_a13
ER  -