PENCHEV , . V. An interesting Early Byzantine lead seal. Contributions to Bulgarian Archaeology | Приноси към българската археология, [S. l.], v. 11, p. 5–7, 2021. DOI: 10.53250/cba11.5-7. Disponível em: https://www.publications.naim.bg/index.php/CBA/article/view/198. Acesso em: 6 oct. 2026.