%0 Journal Article %A E. E. Barbashina %T Optimality conditions of Kelly--Kopp--Moyer type %J Differencialʹnye uravneniâ %D 1997 %P 1462-1469 %V 33 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1997_33_11_a2/ %G ru %F DE_1997_33_11_a2