%0 Journal Article
%A Swanson, C.A.
%T Nonoscillation Criteria for Elliptic Equations
%J Canadian mathematical bulletin
%D 1969
%P 275-280
%V 12
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-034-4/
%R 10.4153/CMB-1969-034-4
%F 10_4153_CMB_1969_034_4