ILYAS AL-HAMDOONI, D. The Effectiveness of Diversification in Reducing Investment Portfolio Risk. TANMIYAT AL-RAFIDAIN, [S. l.], v. 35, n. 112, p. 9–35, 2013. DOI: 10.33899/tanra.2013.162094. Disponível em: https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29857. Acesso em: 8 sep. 2025.