@article{MAN_1893__43_157692,
     author = {Wilhelm Killing},
     title = {Zur projectiven {Geometrie}},
     journal = {Mathematische Annalen},
     pages = {569--590},
     year = {1893},
     volume = {43},
     zbl = {25.1033.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1893__43_157692/}
}