Butrat, A., and C. Suppatvech. “Optimal Order Quantity for Football Jersey Inventory Under Normal and Seasonal Demand Using FlexSim”. NKRAFA JOURNAL OF SCIENCE AND TECHNOLOGY, vol. 22, no. 1, Jan. 2026, pp. 48-67, https://ph02.tci-thaijo.org/index.php/nkrafa-sct/article/view/258460.