%0 Journal Article %A L. V. Taikov %T The approximation in the mean of certain classes of periodic functions %J Informatics and Automation %D 1967 %P 61-70 %V 88 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1967_88_a4/ %G ru %F TRSPY_1967_88_a4