%0 Journal Article
%A M.-B. A. Babaev
%T The approximation of polynomials of two variables by functions of the form $\varphi(x)+\psi(y)$
%J Doklady Akademii Nauk
%D 1970
%P 967-969
%V 193
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1970_193_5_a0/
%G ru
%F DAN_1970_193_5_a0