%0 Journal Article %A K. V. Valikov %T Nonlinear differential equations in a Banach space, close to linear ones %J Differencialʹnye uravneniâ %D 1967 %P 1692-1706 %V 3 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1967_3_10_a6/ %G ru %F DE_1967_3_10_a6