@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/