%0 Journal Article
%A A. I. Stepanets
%T Simultaneous approximation of periodic functions and their derivatives by Fourier sums
%J Doklady Akademii Nauk
%D 1980
%P 543-544
%V 254
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_254_3_a6/
%G ru
%F DAN_1980_254_3_a6