ABEBE, Y. Applying Portfolio Theory in Minimizing Export Earning Loss Risk in Ethiopia. Ethiopian Journal of Development Research, [S. l.], v. 15, n. 2, p. 1–16, 2022. Disponível em: http://ejol.aau.edu.et/index.php/EJDR/article/view/4414. Acesso em: 25 nov. 2024.