@article{MAN_1923__90_159018,
     author = {R. Baldus},
     title = {Zur {Steinerschen} {Definition} der {Projektivit\"at.}},
     journal = {Mathematische Annalen},
     pages = {86--102},
     year = {1923},
     volume = {90},
     zbl = {49.0429.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1923__90_159018/}
}