%0 Journal Article %A L. I. Minchenko %T Necessary optimality conditions for certain classes of discrete control systems %J Differencialʹnye uravneniâ %D 1976 %P 1211-1218 %V 12 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_7_a7/ %G ru %F DE_1976_12_7_a7