STANCHEV, P.; JECHEVA, G.; PAVLOV, R. The Sixth National Information Day: Open Access to Scientific Information. Digital Presentation and Preservation of Cultural and Scientific Heritage, [S. l.], v. 5, p. 365–369, 2015. DOI: 10.55630/dipp.2015.5.35. Disponível em: https://dipp.math.bas.bg/dipp/article/view/dipp.2015.5.35. Acesso em: 5 may. 2024.