@article{GDZPPN002484889,
title = {Lorentzian Cones in Real Lie Algebras.},
journal = {Monatshefte f\"ur Mathematik},
volume = {99},
year = {1985},
pages = {183-210},
zbl = {0571.22015},
url = {http://dml.mathdoc.fr/item/GDZPPN002484889}
}
Hofmann, Karl H.; Hilgert, Joachim. Lorentzian Cones in Real Lie Algebras.. Monatshefte für Mathematik, Tome 99 (1985) pp. 183-210. http://gdmltest.u-ga.fr/item/GDZPPN002484889/