Harahap, Afif Zuhri Muhammad Khodri, Ahmad Taufik Nursal, Khairulnizam Sahlan, and Suheil Che Sobry. “The Characteristics of Demand Rates in Inventory Routing Problem”. Advances in Social Sciences Research Journal 10, no. 7 (July 9, 2023): 76–84. Accessed December 1, 2024. http://804474.wannyin.cyou/index.php/ASSRJ/article/view/15043.