KOVACHEVA, S.; DIMITROVA, L. An E-Learning Environment – a Tool for Presentation of Knowledge about Bulgarian Cultural Heritage Sites. Digital Presentation and Preservation of Cultural and Scientific Heritage, [S. l.], v. 7, p. 169–180, 2017. DOI: 10.55630/dipp.2017.7.15. Disponível em: https://dipp.math.bas.bg/dipp/article/view/dipp.2017.7.15. Acesso em: 28 may. 2024.