%0 Journal Article
%A P. P. Korovkin
%T On the order of the approximation of functions by linear positive operators
%J Doklady Akademii Nauk
%D 1957
%P 1158-1161
%V 114
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_114_6_a5/
%G ru
%F DAN_1957_114_6_a5