TY  - JOUR
AU  - V. T. Shevaldin
TI  - Lower estimates of the widths of the classes of functions defined by a modulus of continuity
JO  - Izvestiya. Mathematics 
PY  - 1995
SP  - 399
EP  - 415
VL  - 45
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1995_45_2_a7/
LA  - en
ID  - IM2_1995_45_2_a7
ER  -