%0 Journal Article
%A N. A. Shirokov
%T Constructive descriptions of classes of functions with the help of polynomial approximations.~I
%J Zapiski Nauchnykh Seminarov POMI
%D 1998
%P 207-234
%V 254
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1998_254_a12/
%G ru
%F ZNSL_1998_254_a12