@article{MZ_1970__117_171410,
     author = {G\"unter Pickert},
     title = {Galilei- und {Lorentz-Gruppen} in affinen {Ebenen.}},
     journal = {Mathematische Zeitschrift},
     pages = {83--96},
     publisher = {mathdoc},
     volume = {117},
     year = {1970},
     zbl = {0203.23002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__117_171410/}
}