%0 Journal Article %A V. I. Bakhtin %T Averaging in multifrequency systems %J Funkcionalʹnyj analiz i ego priloženiâ %D 1986 %P 1-7 %V 20 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1986_20_2_a0/ %G ru %F FAA_1986_20_2_a0