@book{PPN237834022, title = {Gesammelte Abhandlungen Bd. 3}, series = {GDML\_Books}, year = {1935}, language = {ger}, url = {http://dml.mathdoc.fr/item/PPN237834022} }
(éd.). Gesammelte Abhandlungen Bd. 3. GDML_Books (1935), http://gdmltest.u-ga.fr/item/PPN237834022/