%0 Journal Article
%A V. I. Ivanov
%T Direct and inverse theorems in approximation theory for periodic functions in S.\,B.~Stechkins papers and the development of these theorems
%J Trudy Instituta matematiki i mehaniki
%D 2010
%P 5-17
%V 16
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2010_16_4_a0/
%G ru
%F TIMM_2010_16_4_a0