braknia, tahar, and abdelrazzak khelil. “The Applications of Islamic Finance Formulas in Build, Operate and Transfer (B.O.T) Contracts. - Istisna’a As a Model-”. Journal of Excellence for Economics and Management Research 6, no. 2 (December 25, 2022): 79-98. Accessed November 22, 2024. http://journals.lagh-univ.dz/index.php/jeemr/article/view/3591.