%0 Journal Article %A B. D. Tazhibaev %T Optimality conditions in a control problem %J Diskretnyj analiz i issledovanie operacij %D 1988 %P 65-78 %N 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/DA_1988_28_a8/ %G ru %F DA_1988_28_a8