@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/