Huang, Yung-Fu, and Chih-Sung Lai. “Retailer’s Lot-Sizing Policy under Two Warehouses and Two Levels of Delay Permitted Using Algebraic Method”. Yugoslav Journal of Operations Research 17, no. 1 (March 1, 2007): 55–74. Accessed June 3, 2026. https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/209.