%0 Journal Article
%A M. I. Ganzburg
%T A~direct and inverse theorem on approximation by polynomials on the $m$- dimensional ball
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1987
%P 91-92
%V 180
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1987_180_a48/
%G ru
%F TM_1987_180_a48