%0 Journal Article
%A I. I. Golichev
%T Discreteness of the spectrum and completeness of systems of characteristic and associated vectors of second-order nonself-adjoint differential operators
%J Matematičeskie zametki
%D 1971
%P 401-408
%V 9
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1971_9_4_a4/
%G ru
%F MZM_1971_9_4_a4