@article{MZ_1922__13_167700,
     author = {St. Tolles},
     title = {Die windschief involutorischen {Paarungen} in einer linearen {Strahlen-kongmenz} und die beiden {Arten} windschief involutorischer linearer {Strahlen-kongruenzen}},
     journal = {Mathematische Zeitschrift},
     pages = {223--262},
     publisher = {mathdoc},
     volume = {13},
     year = {1922},
     zbl = {48.0693.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1922__13_167700/}
}