الحياني أحمد سيف نعمان. 2019. “The Role of Fatwa and Shari’a Supervisory Boards in Controlling the Transactions of Islamic Banks: A Study in Shari’a and the Yemeni Law”. Journal of Social Studies 24 (4):57-87. https://doi.org/10.20428/jss.v24i4.1476.