TY  - JOUR
AU  - A. S. Romanyuk
TI  - Kolmogorov and trigonometric widths of the Besov classes $B^r_{p,\theta}$ of multivariate periodic functions
JO  - Sbornik. Mathematics
PY  - 2006
SP  - 69
EP  - 93
VL  - 197
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2006_197_1_a4/
LA  - en
ID  - SM_2006_197_1_a4
ER  -