Importance and role of non-governmental organizations in the preservation of cultural heritage – non-formal education and good practices. Research Announcements "Heritage BG", [S. l.], n. 3, p. 22–27, 2025. DOI: 10.58894/AR-HBg.2022.3.22-27. Disponível em: https://periodicals.uni-sofia.bg/index.php/AR-NBg/article/view/1357. Acesso em: 10 mar. 2026.