%0 Journal Article %A V. V. Andrievskii %T On the approximation of functions by harmonic polynomials %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 28-29 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1987_180_a6/ %G ru %F TM_1987_180_a6