WIRTH, P. Brand, Charles M.: Byzantium confronts the West 1180—1204. Südost-Forschungen, [S. l.], v. 1, n. 1, p. 487–488, 2021. Disponível em: https://www.suedost-forschungen.de/portal/index.php/sof/article/view/11649. Acesso em: 14 mai. 2024.