@article{1178207817, author = {Ehrlich, Paul E. and S\'anchez, Miguel}, title = {Some semi-Riemannian volume comparison theorems}, journal = {Tohoku Math. J. (2)}, volume = {52}, number = {4}, year = {2000}, pages = { 331-348}, language = {en}, url = {http://dml.mathdoc.fr/item/1178207817} }
Ehrlich, Paul E.; Sánchez, Miguel. Some semi-Riemannian volume comparison theorems. Tohoku Math. J. (2), Tome 52 (2000) no. 4, pp. 331-348. http://gdmltest.u-ga.fr/item/1178207817/