%0 Journal Article
%A G. G. Magaril-Il'yaev
%A V. M. Tikhomirov
%T Exact values of widths of classes of functions in $L_2$
%J Doklady Akademii Nauk
%D 1995
%P 583-585
%V 344
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1995_344_5_a0/
%G ru
%F DAN_1995_344_5_a0