A Modification of Bai Bithaman Ajil Instrument through Musharakah Mutanaqisah: Fixation of Robust Optimisation into Rule 78. Global Journal of Science Frontier Research, [S. l.], v. 14, n. F7, p. 17–26, 2015. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/1436. Acesso em: 14 aug. 2026.