NOEV, N.; GOYNOV, M.; SAPUNDJIEV, V.; VALEV, I. A Serious Educational Game of Bulgarian Military and Historical Heritage. Digital Presentation and Preservation of Cultural and Scientific Heritage, [S. l.], v. 7, p. 249–254, 2017. DOI: 10.55630/dipp.2017.7.24. Disponível em: https://dipp.math.bas.bg/dipp/article/view/dipp.2017.7.24. Acesso em: 3 jul. 2024.