%0 Journal Article
%A D. L. Berman
%T On the impossibility of constructing a linear polynomial operator furnishing an approximation within the order of the best approximation
%J Doklady Akademii Nauk
%D 1958
%P 1175-1177
%V 120
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_120_6_a0/
%G ru
%F DAN_1958_120_6_a0