%0 Journal Article
%A A. S. Belov
%T Some upper bounds of partial sums of a~trigonometric series cannot be sharpened via lower bounds
%J Matematičeskie zametki
%D 1995
%P 447-451
%V 58
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1995_58_3_a12/
%G ru
%F MZM_1995_58_3_a12