%0 Journal Article %A A. B. Vasil'eva %A A. A. Khasanov %T Application of singular perturbation theory to the study of mathematical problems of mass transfer in multicomponent systems %J Doklady Akademii Nauk %D 1980 %P 529-534 %V 251 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_251_3_a2/ %G ru %F DAN_1980_251_3_a2