%0 Journal Article %A E. E. Barbashina %T Necessary optimality conditions with matrix impulses %J Differencialʹnye uravneniâ %D 1981 %P 579-588 %V 17 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_4_a0/ %G ru %F DE_1981_17_4_a0