%0 Journal Article %A N. Yu. Dodonov %A V. V. Zhuk %T On approximating periodic functions by Riesz sums %J Zapiski Nauchnykh Seminarov POMI %D 2009 %P 18-36 %V 371 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2009_371_a2/ %G ru %F ZNSL_2009_371_a2