@article{CMH_1934__7_138642,
     author = {Rud. Fueter},
     title = {Die {Funktionentheorie} der {Differentialgleichungen} ...u = 0 und ....u = 0 mit vier reellen {Variablen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {307--330},
     publisher = {mathdoc},
     volume = {7},
     year = {1934},
     zbl = {61.1131.05},
     url = {http://geodesic.mathdoc.fr/item/CMH_1934__7_138642/}
}