K. KAGIGI , D. A.; A. KAGIGI, . D. K. . Cointegration, Causality and Intern Portfolio Diversification: An Investigation of Diversification Op-in the MENA Markets. . Dirasat in Economics and Business , [S. l.], v. 40, n. 1, 2021. DOI: 10.37376/deb.v40i1.3849. Disponível em: https://journals.uob.edu.ly/index.php/DEB/article/view/3849. Acesso em: 5 jun. 2026.