%0 Journal Article %A A. L. Piatnitski %T Averaging a~singularly perturbed equation with rapidly oscillating coefficients in a~layer %J Sbornik. Mathematics %D 1984 %P 19-40 %V 49 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1984_49_1_a1/ %G en %F SM_1984_49_1_a1