@book{PPN622653245, title = {Die \"Ahnlichkeit der Figuren Heft 3}, series = {GDML\_Books}, publisher = {Nebert}, address = {Halle}, year = {1890}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN622653245} }
Köstler, Hermann J. Die Ähnlichkeit der Figuren Heft 3. GDML_Books (1890), http://gdmltest.u-ga.fr/item/PPN622653245/