Firdaus DA, Jihad FH, Mursaha SIM. Sources of cysteine-based pharmaceutical drugs and their halal aspects in product development. Halal Stud. Soc. [Internet]. 2023 Dec. 18 [cited 2025 Dec. 24];1(1):34-7. Available from: https://journal.ipb.ac.id/hass/article/view/52976