%0 Journal Article %A S. M. Pergamenshchikov %T Asymptotic expansions for a model with distinguished ``fast'' and ``slow'' variables, described by a~system of singularly perturbed stochastic differential equations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1994 %P 1-44 %V 49 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1994_49_4_a0/ %G en %F RM_1994_49_4_a0