%0 Journal Article %A E. N. Gersht %T A generalization of Ljapunov's first theorem on stability to certain classes of differential equations in a Banach space %J Differencialʹnye uravneniâ %D 1969 %P 833-847 %V 5 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_5_a4/ %G ru %F DE_1969_5_5_a4