%0 Journal Article
%A N. M. Andrushevskii
%A N. P. Zhidkov
%A B. M. Shchedrin
%T The optimal approximations of functions by a finite number of their fourier coefficients
%J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki
%D 1978
%P 1595-1599
%V 18
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZVMMF_1978_18_6_a22/
%G ru
%F ZVMMF_1978_18_6_a22