Unknown, forgotten and (re)discovered: a possible new life for three fortresses near the town of Kavarna. Research Announcements "Heritage BG", [S. l.], n. 5, p. 102–112, 2025. DOI: 10.58894/AR-HBg.2023.5.102-112. Disponível em: https://periodicals.uni-sofia.bg/index.php/AR-NBg/article/view/1347. Acesso em: 10 mar. 2026.