%0 Journal Article %A V. B. Levenshtam %T Higher approximations of the averaging method for a convection problem in a field of rapidly oscillating forces %J Differencialʹnye uravneniâ %D 1990 %P 1792-1800 %V 26 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_10_a17/ %G ru %F DE_1990_26_10_a17