@article{GDZPPN00225333X,
title = {Ueber die Clifford-Klein'schen Raumformen.},
journal = {Mathematische Annalen},
volume = {38},
year = {1891},
pages = {257-278},
zbl = {23.0529.01},
url = {http://dml.mathdoc.fr/item/GDZPPN00225333X}
}
Killing, W. Ueber die Clifford-Klein'schen Raumformen.. Mathematische Annalen, Tome 38 (1891) pp. 257-278. http://gdmltest.u-ga.fr/item/GDZPPN00225333X/