Hadhek, Zouhaier, Manel Frifita, and Mosbah Lafi. 2018. “The Determinants of Profit Efficiency of Islamic Banks Using Stochastic Frontier Analysis Approach”. International Journal of Economics and Financial Issues 8 (6):20-29. https://mail.econjournals.com/index.php/ijefi/article/view/6996.