%0 Journal Article
%A S. B. Vakarchuk
%T $K$-Functionals and Exact Values of n-Widths of Certain Classes in the Spaces $C(2\pi )$ and $L_1(2\pi )$
%J Matematičeskie zametki
%D 2002
%P 522-531
%V 71
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_2002_71_4_a3/
%G ru
%F MZM_2002_71_4_a3