MUHAMMAD, Muhammad A.; AL-HAMDANI, Rafiaa Ibrahim. The role of international diversification in building the optimal investment portfolio using the cut-off model Analytical Study in a number of international markets. Tikrit Journal of Administrative and Economic Sciences, [S. l.], v. 18, n. 59, 2, p. 309–326, 2022. DOI: 10.25130/tjaes.18.59.2.19. Disponível em: https://www.tjaes.org/index.php/tjaes/article/view/483. Acesso em: 24 jan. 2026.