%0 Journal Article
%A B. M. Levitan
%A G. A. Suvorchenkova
%T Sufficient conditions for a discrete spectrum in the case of a Sturm--Liouville equation with operator coefficients
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1968
%P 56-62
%V 2
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1968_2_2_a5/
%G ru
%F FAA_1968_2_2_a5