%0 Journal Article
%A E. P. Dolzhenko
%A E. A. Sevast'yanov
%T On the dependence of properties of functions on their degree of approximation by polynomials
%J Izvestiya. Mathematics 
%D 1978
%P 255-288
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1978_12_2_a4/
%G en
%F IM2_1978_12_2_a4