%0 Journal Article
%A V. N. Temlyakov
%T Approximation of periodic functions of several variables by trigonometric polynomials, and widths of some classes of functions
%J Izvestiya. Mathematics 
%D 1986
%P 285-322
%V 27
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1986_27_2_a5/
%G en
%F IM2_1986_27_2_a5