Tengku Muhamad Rozi, Tengku Sofia Zulaikha, and Cik Sri Mazzura Muhammad Basri. 2024. “Inventory Control in Multi-Supplier System under Quantity Discount With Deteriorating Inventory”. Enhanced Knowledge in Sciences and Technology 4 (1): 111-19. https://penerbit.uthm.edu.my/periodicals/index.php/ekst/article/view/14268.