%0 Journal Article %A V. S. Buslaev %T Semiclassical approximation for equations with periodic coefficients %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 97-125 %V 42 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1987_42_6_a3/ %G en %F RM_1987_42_6_a3