%0 Journal Article %A V. S. Ryaben'kii %T Systems of difference equations with localized effect of right side %J Matematičeskie zametki %D 1969 %P 249-255 %V 6 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1969_6_2_a13/ %G ru %F MZM_1969_6_2_a13