%0 Journal Article
%A Vougalter, Vitali
%T On the Negative Index Theorem for the Linearized Non-Linear Schrödinger Problem
%J Canadian mathematical bulletin
%D 2010
%P 737-745
%V 53
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2010-062-4/
%R 10.4153/CMB-2010-062-4
%F 10_4153_CMB_2010_062_4