%0 Journal Article
%A M. I. Ganzburg
%T A~direct and inverse theorem on approximation by polynomials on the $m$- dimensional ball
%J Informatics and Automation
%D 1987
%P 91-92
%V 180
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a48/
%G ru
%F TRSPY_1987_180_a48