PENCHEV, V. НОВООТКРИТ МОЛИВДОВУЛ НА СИМЕОН I С ТИТЛАТА „АРХОНТ НА БЪЛГАРИЯ“: A NEWLY DISCOVERED LEAD SEAL (MOLYBDOBULL) OF SIMEON I WITH THE TITLE “ARCHON OF BULGARIA”. Numismatics, Sigillography and Epigraphy | Нумизматика, сфрагистика и епиграфика, [S. l.], v. 20, p. 193–198, 2024. DOI: 10.53250/nse20.193-198. Disponível em: https://publications.naim.bg/index.php/NSE/article/view/418. Acesso em: 11 jun. 2026.