@article{PPN237821559+dmdlog17,
title = {\S\ 6. Die ambigen Klassen},
booktitle = {Gesammelte Abhandlungen Bd. 1},
series = {GDML\_Books},
year = {1932},
pages = {38},
url = {http://dml.mathdoc.fr/item/PPN237821559+dmdlog17}
}
(éd.). § 6. Die ambigen Klassen, dans Gesammelte Abhandlungen Bd. 1, GDML_Books, (1932), p. 38. http://gdmltest.u-ga.fr/item/PPN237821559+dmdlog17/