%0 Journal Article %A M. Z. Solomyak %T The application of the semigroup theory to the study of differential equations in Banach spaces %J Doklady Akademii Nauk %D 1958 %P 766-769 %V 122 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_122_5_a4/ %G ru %F DAN_1958_122_5_a4