%0 Journal Article
%A A. K. Kushpel'
%T Sharp estimates of the widths of convolution classes in the space $C_{2\pi}$
%J Informatics and Automation
%D 1987
%P 148-149
%V 180
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a86/
%G ru
%F TRSPY_1987_180_a86