中世における異端審問
Hamilton, Bernard (1981). The Medieval Inquisition. New York: Holmes & Meier. ISBN 0-8419-0695-5. https://archive.org/details/medievalinquisit0000hami
(イタリア語) Dizionario storico dell’Inquisizione, diretto da Adriano Prosperi, Pisa 2015, 4 vols. (supersedes nearly all earlier publications)