TY  - JOUR
AU  - V. N. Temlyakov
TI  - Approximation of periodic functions of several variables by trigonometric polynomials, and widths of some classes of functions
JO  - Izvestiya. Mathematics 
PY  - 1986
SP  - 285
EP  - 322
VL  - 27
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1986_27_2_a5/
LA  - en
ID  - IM2_1986_27_2_a5
ER  -