Roll, Eugen. Ketzer zwischen Orient und Okzident: Patarener, Paulikianer, Bogomilen. Mellinger: Stuttgart, 1978. ISBN 3-88069-190-8
Dizionario Biografico degli Italiani. Rome.
Les collections de l'histoire, no. 26, page 26.
Coleman, Edward. “Representative Assemblies in Communal Italy”, in P.S. Barnwell & Marco Mostert (eds.), Political Assemblies in the Early Middle Ages. Turnhout, 2003. 193-210
Cowdrey, H.E.J. Cowdrey. “Archbishop Aribert of Milan”, History 51, 1966. 1-15
Cowdrey. “The Papacy, the Patarenes and the Church of Milan”, Transactions of Royal Historical Society, 5th series, vol. 18, 1968. 25-48
Cushing, Kathleen G. “Events That Led to Sainthood: Sanctity and the Reformers in the Eleventh Century”, in Richard Gameson & Henrietta Leyser (eds.), Belief and Culture in the Middle Ages. Oxford & New York, 2001. 187-96
Patschovsky, Alexander. “Heresy & Society: On the Political Function of Heresy in the Medieval World”, in Caterina Bruschi & Peter Biller (eds.), Texts and the Repression of Medieval Heresy. 23-41
Siegel, Arthur. “Italian Society and the Origins of Eleventh-Century Western Heresy”, in Michael Frassetto (ed.), Heresy and the Persecuting Society in the Middle Ages: Essays on the Work of R.I. Moore. Leiden, 2006. 43-72
Stock, Brian. The Implications of Literacy: Written Languages and Models of Interpretation in the Eleventh and Twelfth Centuries. Princeton, 1983
Strategi Solo vs Squad di Free Fire: Cara Menang Mudah!