@article{MZ_1930__32_168226,
     author = {I., Johansson},
     title = {Ein {Beitrag} zur ebenen {Geometrie} von {Laguerre}},
     journal = {Mathematische Zeitschrift},
     pages = {259--290},
     publisher = {mathdoc},
     volume = {32},
     year = {1930},
     zbl = {56.1157.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1930__32_168226/}
}