%0 Journal Article %A A. M. Popov %T Estimates of solutions of some systems of differential equations with large retardation %J Matematičeskie zametki %D 1969 %P 483-488 %V 6 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1969_6_4_a13/ %G ru %F MZM_1969_6_4_a13