MAHMOOD, Zainab makki. Building the optimal investment portfolio according to the simple gradual method, with the shadow of allowing and not allowing short selling: An applied study in the Iraq Stock Exchange. Tikrit Journal of Administrative and Economic Sciences, [S. l.], v. 18, n. 60, 3, p. 500–520, 2022. DOI: 10.25130/tjaes.18.60.3.28. Disponível em: https://www.tjaes.org/index.php/tjaes/article/view/1328. Acesso em: 9 may. 2026.