%0 Journal Article %A I. Z. Shtokalo %T An important contribution to the development of differential equations and their application %J Differencialʹnye uravneniâ %D 1978 %P 2123-2130 %V 14 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1978_14_12_a1/ %G ru %F DE_1978_14_12_a1