%0 Journal Article
%A L. B. Zelenko
%T Conditions for the semiboundedness and discreteness of the spectrum of the Sturm--Liouville operator on the semi-axis
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1967
%P 31-40
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1967_9_a3/
%G ru
%F IVM_1967_9_a3