Gupta, Kavita. “Inventory and Transportation Cost Minimization in the Delivery Logistics of Swine Flu Vaccine”. Yugoslav Journal of Operations Research 27, no. 4 (November 1, 2017): 481–497. Accessed July 28, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/521.