TY  - JOUR
AU  - M. Sh. Shabozov
AU  - G. A. Yusupov
TI  - Best Polynomial Approximations in~$L_2$ of Classes of $2\pi$-Periodic Functions and Exact Values of Their Widths
JO  - Matematičeskie zametki
PY  - 2011
SP  - 764
EP  - 775
VL  - 90
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2011_90_5_a10/
LA  - ru
ID  - MZM_2011_90_5_a10
ER  -