%0 Journal Article
%A N. P. Korneichuk
%T On the existence of a linear polynomial operator giving the best approximation on a class of functions
%J Doklady Akademii Nauk
%D 1962
%P 25-27
%V 143
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_143_1_a5/
%G ru
%F DAN_1962_143_1_a5