TY  - JOUR
AU  - V. V. Andrievskii
TI  - On~approximation of functions by harmonic polynomials
JO  - Izvestiya. Mathematics 
PY  - 1988
SP  - 1
EP  - 13
VL  - 30
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1988_30_1_a0/
LA  - en
ID  - IM2_1988_30_1_a0
ER  -