http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Register of the Papal Documents Surviving within the Kingdom of Hungary (1417-1526)
Fraknói Vilmos Római Történeti Kutatócsoport
Collectanea Vaticana Hungariae, classis II 10 separatum No. 10