%0 Journal Article
%A A. F. Timan
%A V. N. Trofimov
%T Exact constants in some converse theorems for approximations by trigonometric polynomials
%J Matematičeskie zametki
%D 1976
%P 787-792
%V 20
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1976_20_5_a20/
%G ru
%F MZM_1976_20_5_a20