@article{MZ_1934__38_168490,
     author = {H. Boldt},
     title = {Raumgeometrie und {Spiegelungslehre}},
     journal = {Mathematische Zeitschrift},
     pages = {104--134},
     year = {1934},
     volume = {38},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1934__38_168490/}
}