“A Modification of Bai Bithaman Ajil Instrument through Musharakah Mutanaqisah: Fixation of Robust Optimisation into Rule 78” (2015) Global Journal of Science Frontier Research, 14(F7), pp. 17–26. Available at: https://www.journalofscience.org/index.php/GJSFR/article/view/1436 (Accessed: 13 August 2026).