%0 Journal Article %A R. I. Kozlov %A V. M. Matrosov %T The comparison principle in the theory of differential equations with perturbations %J Doklady Akademii Nauk %D 1980 %P 807-811 %V 253 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_253_4_a7/ %G ru %F DAN_1980_253_4_a7