%0 Journal Article
%A S. N. Bernshtein
%T On the best approximation of functions of several variables by means of polynomials or trigonometric sums
%J Informatics and Automation
%D 1951
%P 24-29
%V 38
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1951_38_a2/
%G ru
%F TRSPY_1951_38_a2