BIRBIRSO, D. T.; GERBA, T. G. Questioning the Origin of Indo-European: A Comparative Evolutionary Analysis of Hittite and Cushitic (Oromo). International Journal of Sciences: Basic and Applied Research (IJSBAR), [S. l.], v. 19, n. 2, p. 250–280, 2015. Disponível em: https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/3181. Acesso em: 5 may. 2024.