%0 Journal Article
%A V. A. Sloushch
%T The discrete spectrum of differential operators in the spectral gaps in the case of nonnegative perturbations of

%J Zapiski Nauchnykh Seminarov POMI
%D 2000
%P 325-335
%V 270
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2000_270_a16/
%G ru
%F ZNSL_2000_270_a16