TY  - JOUR
AU  - S. B. Vakarchuk
AU  - V. I. Zabutnaya
TI  - Inequalities between Best Polynomial Approximations and Some Smoothness Characteristics in the Space~$L_2$ and Widths of Classes of Functions
JO  - Matematičeskie zametki
PY  - 2016
SP  - 215
EP  - 238
VL  - 99
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2016_99_2_a5/
LA  - ru
ID  - MZM_2016_99_2_a5
ER  -