%0 Journal Article
%A O. G. Rovenskaya
%T An exact constant on the estimation of the approximation error of classes of differentiable functions by the second-order Cesaro means
%J Matematičeskie trudy
%D 2021
%P 150-159
%V 24
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MT_2021_24_2_a8/
%G ru
%F MT_2021_24_2_a8