@article{GDZPPN00223405X,
title = {Geodesics on Lorentzian manifolds with quasi-convex boundary.},
journal = {Manuscripta mathematica},
volume = {79},
year = {1993},
pages = {381-396},
zbl = {0795.53062},
url = {http://dml.mathdoc.fr/item/GDZPPN00223405X}
}
Giannoni, Fabio; Masiello, Antonio. Geodesics on Lorentzian manifolds with quasi-convex boundary.. Manuscripta mathematica, Tome 79 (1993) pp. 381-396. http://gdmltest.u-ga.fr/item/GDZPPN00223405X/