%0 Journal Article
%A V. F. Babenko
%A S. A. Pichugov
%T An exact inequality for the derivative of a trigonometric polynomial having only real zeros
%J Matematičeskie zametki
%D 1986
%P 330-336
%V 39
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1986_39_3_a3/
%G ru
%F MZM_1986_39_3_a3