@book{PPN588388580, title = {Theorie der Transformationsgruppen Abschn. 2}, series = {GDML\_Books}, publisher = {Teubner}, address = {Leipzig}, year = {1890}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN588388580} }
Lie, Sophus. Theorie der Transformationsgruppen Abschn. 2. GDML_Books (1890), http://gdmltest.u-ga.fr/item/PPN588388580/