TY  - JOUR
AU  - Butler, G. J.
AU  - Erbe, L. H.
AU  - Mathsen, R. M.
TI  - On the Non-Existence of Conjugate Points
JO  - Canadian mathematical bulletin
PY  - 1970
SP  - 31
EP  - 37
VL  - 13
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-006-x/
DO  - 10.4153/CMB-1970-006-x
ID  - 10_4153_CMB_1970_006_x
ER  -