%0 Journal Article
%A M.-B. A. Babaev
%T Extremal elements and the value of the best approximation of a monotone function on $R^n$ by sums of functions of fewer variables
%J Doklady Akademii Nauk
%D 1982
%P 11-13
%V 265
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1982_265_1_a0/
%G ru
%F DAN_1982_265_1_a0