@article{PPN59250879X+DMDLOG_0009, title = {Sechster Abschnitt.}, booktitle = {Arithmetik und Algebra Theil 1}, series = {GDML\_Books}, publisher = {Hirt}, address = {Breslau}, year = {1876}, pages = {94}, url = {http://dml.mathdoc.fr/item/PPN59250879X+DMDLOG_0009} }
(éd.). Sechster Abschnitt., dans Arithmetik und Algebra Theil 1, GDML_Books, (1876), p. 94. http://gdmltest.u-ga.fr/item/PPN59250879X+DMDLOG_0009/