TY  - JOUR
AU  - Arif S. Dzhafarov
TI  - Certain direct and inverse theorems in the theory of best approximations of functions by algebraic polynomials
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 719
EP  - 722
VL  - 187
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_187_4_a2/
LA  - ru
ID  - DAN_1969_187_4_a2
ER  -