%0 Journal Article
%A Allegretto, Walter
%T Lower Bounds on the Number of Points in the Lower Spectrum of Elliptic Operators
%J Canadian journal of mathematics
%D 1979
%P 419-426
%V 31
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-045-0/
%R 10.4153/CJM-1979-045-0
%F 10_4153_CJM_1979_045_0