TY  - JOUR
AU  - M. I. Ganzburg
TI  - A~direct and inverse theorem on approximation by polynomials on the $m$- dimensional ball
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1987
SP  - 91
EP  - 92
VL  - 180
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1987_180_a48/
LA  - ru
ID  - TM_1987_180_a48
ER  -