%0 Journal Article %A I. I. Bezvershenko %T A certain method of constructing an approximate solution of first order differential equations %J Differencialʹnye uravneniâ %D 1971 %P 1315-1319 %V 7 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_7_a14/ %G ru %F DE_1971_7_7_a14