Mahmood, Haider, Tarek Tawfik Yousef Alkhateeb, and Nabil Maalel. “Egyptian Intra Agriculture Trade With COMESA Trading Partners: A Gravity Model”. International Journal of Economics and Financial Issues 6, no. 6S (March 12, 2017): 177–182. Accessed April 30, 2025. https://mail.econjournals.org.tr/index.php/ijefi/article/view/4145.