El Sayed, Abdel Salam Awad Khair, and Asaad Mubarak Hussein. “-Role of Financial Derivatives in Rationalizing Investment Decisions- Field Study on Sample of Brokerage Firms in Khartoum Stock of Exchange”. Journal of Economic, Administrative and Legal Sciences 3, no. 4 (April 30, 2019): 20–1. Accessed December 20, 2025. https://ajsrp.ojsexpert.com/index.php/jeals/article/view/864.