@article{MZ_1923__17_167742,
     author = {W., J\"anichen},
     title = {\"Uber einen zahlentheoretischen {Satz} von {Hurwitz}},
     journal = {Mathematische Zeitschrift},
     pages = {277--292},
     publisher = {mathdoc},
     volume = {17},
     year = {1923},
     zbl = {49.0696.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1923__17_167742/}
}