%0 Journal Article
%A V. P. Belogrud'
%A A. G. Kostyuchenko
%T The density of the spectrum of a Sturm–Liouville operator
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1973
%V 28
%N 2
%U http://geodesic.mathdoc.fr/item/RM_1973_28_2_a12/
%G ru
%F RM_1973_28_2_a12