%0 Journal Article %A A. Yu. Veretennikov %T On the averaging principle for systems of stochastic differential equations %J Sbornik. Mathematics %D 1991 %P 271-284 %V 69 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1991_69_1_a15/ %G en %F SM_1991_69_1_a15