%0 Journal Article %A S. B. Stechkin %T The approximation of periodic functions by Fej\'er sums %J Informatics and Automation %D 1961 %P 48-60 %V 62 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1961_62_a1/ %G ru %F TRSPY_1961_62_a1