@article{MAN_1891__39_157572,
     author = {W. Killing},
     title = {Ueber die {Clifford-Klein'schen} {Raumformen.}},
     journal = {Mathematische Annalen},
     pages = {257--278},
     publisher = {mathdoc},
     volume = {39},
     year = {1891},
     zbl = {23.0529.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1891__39_157572/}
}