LONGO, Umberto. A Saint of Damned Memory. Clement III, (Anti)Pope. Reti Medievali Rivista, [S. l.], v. 13, n. 1, p. 137–151, 2012. DOI: 10.6092/1593-2214/341. Disponível em: https://serena.atcult.it/index.php/rm/article/view/urn%3Anbn%3Ait%3Aunina-3355. Acesso em: 24 apr. 2025.