@article{MZ_1969__110_171176,
     author = {Rolf Walter},
     title = {Zur allgemeinen und projektiven {Kinematik} einparametriger {Ebenenscharen.}},
     journal = {Mathematische Zeitschrift},
     pages = {339--374},
     publisher = {mathdoc},
     volume = {110},
     year = {1969},
     zbl = {0181.49501},
     url = {http://geodesic.mathdoc.fr/item/MZ_1969__110_171176/}
}