@article{MAN_1940__117_160041,
     author = {B. Schoeneberg},
     title = {\"Uber die {....-Funktion} einfacher hyperkomplexer {Systeme}},
     journal = {Mathematische Annalen},
     pages = {85--88},
     publisher = {mathdoc},
     volume = {117},
     year = {1940},
     zbl = {65.0097.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1940__117_160041/}
}