TY  - JOUR
AU  - D.N. Kupeli
TI  - On Existence and Comparison of Conjugate Points in Riemannian and Lorentzian Geometry.
JO  - Mathematische Annalen
PY  - 1986
SP  - 67
EP  - 80
VL  - 276
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1986__276_164184/
ID  - MAN_1986__276_164184
ER  -