%0 Journal Article
%A V. S. Balaganskii
%T Exact constant in the Jackson--Stechkin inequality in the space $L^2$ on the period
%J Trudy Instituta matematiki i mehaniki
%D 2009
%P 79-101
%V 15
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2009_15_1_a6/
%G ru
%F TIMM_2009_15_1_a6