MEKONEN, Kasahun desyalew. Desperate Option of the Dark Time: the Role and Challenges of . International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 24, n. 3, p. 348–363, 2015. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/4654. Acesso em: 5 nov. 2025.