@article{CMH_1934__7_138633,
     author = {W. Scherrer},
     title = {Quaternionen und {Semivektoren.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {141--149},
     publisher = {mathdoc},
     volume = {7},
     year = {1934},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1934__7_138633/}
}