%0 Journal Article
%A R. V. Guseinov
%T On the number of negative spectrum points of elliptic operators
%J Trudy Seminara im. I.G. Petrovskogo
%D 2009
%P 67-73
%V 27
%N 27
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TSP_2009_27_27_a1/
%G ru
%F TSP_2009_27_27_a1