@book{PPN584709110, title = {Ioannis Hispalensis Liber algorismi de pratica arismetrice Vol. 2}, series = {GDML\_Books}, publisher = {Tip. delle Scienze Fisiche}, address = {Roma}, year = {1857}, language = {la}, url = {http://dml.mathdoc.fr/item/PPN584709110} }
Boncompagni, Baldassare. Ioannis Hispalensis Liber algorismi de pratica arismetrice Vol. 2. GDML_Books (1857), http://gdmltest.u-ga.fr/item/PPN584709110/