Educational video game for Valchan Voivoda. Research Announcements "Heritage BG", [S. l.], n. 1, p. 110–117, 2025. DOI: 10.58894/AR-HBg.2021.1.110-117. Disponível em: https://periodicals.uni-sofia.bg/index.php/AR-NBg/article/view/1386. Acesso em: 10 mar. 2026.