TY  - JOUR
AU  - V. T. Shevaldin
TI  - Lower bounds for the widths of classes of periodic functions with a~bounded fractional derivative
JO  - Matematičeskie zametki
PY  - 1993
SP  - 145
EP  - 151
VL  - 53
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1993_53_2_a18/
LA  - ru
ID  - MZM_1993_53_2_a18
ER  -