%0 Journal Article
%A V. T. Shevaldin
%T Lower estimations of widths some classes of periodic functions
%J Informatics and Automation
%D 1992
%P 242-267
%V 198
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1992_198_a13/
%G ru
%F TRSPY_1992_198_a13