Medioevo ereticale - Capitani, Ovidio, 1930-2012 (Bologna : Società editrice il Mulino, 1983)
Keywords: 11.-13. století; hereze -- 11.-13. století; heretici -- 11.-13. století; heresies -- 11th-13th centuries; heretics -- 11th-13th centuries; studie; sborníky; studies; papers of several authors