Gerritsen & Van Melle 1998, Dictionary of Medieval Heroes, reprinted 2000, pp.247 "Seven Sages of Rome" Gerritsen, Willem Pieter; Van Melle, Anthony G. (1998). 《Dictionary of Medieval Heroes: Characters in Medieval Narrative Traditions and Their Afterlife in Literature, Theatre and the Visual Arts》. Boydell Press. Reprint: Boydell & Brewer 2000. ISBN0851157807, 9780851157801 (preview)