@article{701768,
     title = {Isometry groups of Lobachevskian spaces, similarity transformation groups of Euclidean spaces and Lorentzian holonomy groups},
     booktitle = {Proceedings of the 25th Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {2006},
     pages = {[87]-97},
     mrnumber = {MR2287128},
     zbl = {1126.53046},
     url = {http://dml.mathdoc.fr/item/701768}
}

Galaev, Anton S. Isometry groups of Lobachevskian spaces, similarity transformation groups of Euclidean spaces and Lorentzian holonomy groups, dans Proceedings of the 25th Winter School "Geometry and Physics", GDML_Books,  (2006), pp. [87]-97. http://gdmltest.u-ga.fr/item/701768/