KOVACHEVA, S. Presentation of UNESCO Bulgarian Cultural Heritage Sites as Knowledge System in a Learning Environment. Digital Presentation and Preservation of Cultural and Scientific Heritage, [S. l.], v. 6, p. 179–188, 2016. DOI: 10.55630/dipp.2016.6.17. Disponível em: https://dipp.math.bas.bg/dipp/article/view/dipp.2016.6.17. Acesso em: 25 may. 2024.