@book{PPN23599524X, title = {Hoehere Arithmetik Bd. 2}, series = {GDML\_Books}, year = {1863}, language = {lat}, url = {http://dml.mathdoc.fr/item/PPN23599524X} }
(éd.). Hoehere Arithmetik Bd. 2. GDML_Books (1863), http://gdmltest.u-ga.fr/item/PPN23599524X/