@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/