Osman, Hassan Ali, Ezaldeen Abdulrahman Hassan, and Abdelgalal Osman Idris Abkar. β€œAn Econometric Study of the Determinants of Foreign Direct Investment in Sudan During the Period (1999 – 2019) by Using the Autoregressive Distributed Lag Model (ARDL)”. Journal of Economic, Administrative and Legal Sciences 5, no. 7 (April 30, 2021): 18–1. Accessed December 20, 2025. https://ajsrp.ojsexpert.com/index.php/jeals/article/view/3581.