@article{MAN_1933__108_159635,
     author = {H. Frasch},
     title = {Die {Erzeugenden} der {Hauptkongruenzgruppen} f\"ur {Primzahlstufen}},
     journal = {Mathematische Annalen},
     pages = {229--252},
     publisher = {mathdoc},
     volume = {108},
     year = {1933},
     zbl = {59.0146.04},
     url = {http://geodesic.mathdoc.fr/item/MAN_1933__108_159635/}
}