Shaza El-Shimey, Umar Idris, and Shabir Hakim. “ISTIJRAR CONTRACTS – AN UNTAPPED GEM IN HEDGING PRICE RISK IN COMMODITY ACCUMULATORS”. PalArch’s Journal of Archaeology of Egypt / Egyptology, vol. 18, no. 13, May 2021, pp. 918-27, https://archives.palarch.nl/index.php/jae/article/view/8246.