%0 Journal Article
%A Leighton, Walter
%T Some Comparison Theorems for Conjugate And σ-Points
%J Canadian journal of mathematics
%D 1976
%P 1172-1179
%V 28
%N 6
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-116-5/
%R 10.4153/CJM-1976-116-5
%F 10_4153_CJM_1976_116_5