%0 Journal Article
%A A. G. Babenko
%T On the Jackson–Stechkin inequality for the best $L^2$-approximations of functions by trigonometric polynomials
%J Trudy Instituta matematiki i mehaniki
%D 2001
%P 30-46
%V 7
%N 1
%U http://geodesic.mathdoc.fr/item/TIMM_2001_7_1_a2/
%G ru
%F TIMM_2001_7_1_a2