%0 Journal Article %A Kh. Yu. Kurdanov %T The stability of a system of differential equations of lagging type %J Differencialʹnye uravneniâ %D 1971 %P 543-544 %V 7 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_3_a19/ %G ru %F DE_1971_7_3_a19