%0 Journal Article %A V. O. Dron %A V. V. Zhuk %T On approximation of periodic functions by modified Steklov averages in~$L_2$ %J Zapiski Nauchnykh Seminarov POMI %D 2014 %P 20-33 %V 429 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2014_429_a2/ %G ru %F ZNSL_2014_429_a2