@article{PPN58525494X+DMDLOG_0012, title = {Drittes Kapitel. Indices der conjugirten Systeme.}, booktitle = {Handbuch der h\"oheren Algebra 2}, series = {GDML\_Books}, publisher = {Teubner}, address = {Leipzig}, year = {1879}, pages = {264}, url = {http://dml.mathdoc.fr/item/PPN58525494X+DMDLOG_0012} }
(éd.). Drittes Kapitel. Indices der conjugirten Systeme., dans Handbuch der höheren Algebra 2, GDML_Books, (1879), p. 264. http://gdmltest.u-ga.fr/item/PPN58525494X+DMDLOG_0012/