T. S. Z. Tengku Muhamad Rozi and C. S. M. Muhammad Basri, “Inventory Control in Multi-Supplier System under Quantity Discount with Deteriorating Inventory”, EKST, vol. 4, no. 1, pp. 111–119, Aug. 2024, Accessed: Aug. 16, 2024. [Online]. Available: https://penerbit.uthm.edu.my/periodicals/index.php/ekst/article/view/14268