%0 Journal Article
%A G. Kh. Kirov
%A P. D. Proinov
%T The approximation of functions of several variables by trigonometric polynomials
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1977
%P 50-54
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1977_6_a5/
%G ru
%F IVM_1977_6_a5