%0 Journal Article %A L. A. Shaginyan %T Summability of series with respect to a~Haar system by the $(C,1)$ method %J Matematičeskie zametki %D 1974 %P 393-404 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1974_15_3_a5/ %G ru %F MZM_1974_15_3_a5