TY  - JOUR
AU  - M. K. Potapov
AU  - F. M. Berisha
TI  - On the connection between a~$r$-order modulus of smoothness and the~best approximation by algebraic polynomials
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 1999
SP  - 563
EP  - 587
VL  - 5
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_1999_5_2_a12/
LA  - ru
ID  - FPM_1999_5_2_a12
ER  -