@book{PPN584694245, title = {Geometrie Th. 2}, series = {GDML\_Books}, publisher = {Zwissler}, address = {Wolfenb\"uttel}, year = {1879}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN584694245} }
Schlegel, Victor. Geometrie Th. 2. GDML_Books (1879), http://gdmltest.u-ga.fr/item/PPN584694245/