TY  - JOUR
AU  - M. G. Esmaganbetov
TI  - Widths of classes from $L_2[0,2\pi]$ and the minimization of exact constants in Jackson-type inequalities
JO  - Matematičeskie zametki
PY  - 1999
SP  - 816
EP  - 820
VL  - 65
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1999_65_6_a2/
LA  - ru
ID  - MZM_1999_65_6_a2
ER  -