Al Taher, Ibrahim Ahmed, and Abtahal Mohammed Ahmed Al Bashir. “(The Impact of Functional Information System on Competitive Advantage (An Applied Study on Omdurman National Bank- Sudan”. Journal of Economic, Administrative and Legal Sciences 3, no. 3 (March 30, 2019): 60–44. Accessed December 20, 2025. https://www.ajsrp.ojsexpert.com/index.php/jeals/article/view/698.