@article{CMH_1934__6_138618,
     author = {Rud. Fueter},
     title = {Quaternionenringe.},
     journal = {Commentarii mathematici Helvetici},
     pages = {199--222},
     publisher = {mathdoc},
     volume = {6},
     year = {1934},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMH_1934__6_138618/}
}