LACKNER, W. Μελέτες Βυζαντινής Ιστορίας (11 ου —13 ου αιώνα). Südost-Forschungen, [S. l.], v. 1, n. 1, p. 464–465, 2021. Disponível em: https://www.suedost-forschungen.de/portal/index.php/sof/article/view/8853. Acesso em: 14 mai. 2024.