%0 Journal Article %A N. G. Bulgakov %T A question on rough systems with aftereffect %J Differencialʹnye uravneniâ %D 1967 %P 1095-1099 %V 3 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1967_3_7_a7/ %G ru %F DE_1967_3_7_a7