@article{CMH_1933__5_138604,
     author = {Rudolf Fueter},
     title = {Ein {Satz} \"uber die {Ring-} und {Strahlklassenzahlen} in algebraischen {Zahlk\"orpern.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {319--322},
     publisher = {mathdoc},
     volume = {5},
     year = {1933},
     zbl = {0006.29301},
     url = {http://geodesic.mathdoc.fr/item/CMH_1933__5_138604/}
}