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, Vol. 6, no. 2, Dec. 2022, pp. 79-98, doi:10.34118/jeemr.v6i2.3591.