@article{GDZPPN002336960,
title = {A Morse index for geodesics in static Lorentz manifolds.},
journal = {Mathematische Annalen},
volume = {293},
year = {1992},
pages = {433-442},
zbl = {0735.58011},
url = {http://dml.mathdoc.fr/item/GDZPPN002336960}
}
Benci, Vieri; Masiello, Antonio. A Morse index for geodesics in static Lorentz manifolds.. Mathematische Annalen, Tome 293 (1992) pp. 433-442. http://gdmltest.u-ga.fr/item/GDZPPN002336960/