Mandal, Wasim Akram, and Sahidul Islam. “Fuzzy Inventory Model for Deteriorating Items, With Time Depended Demand, Shortages, and Fully Backlogging”. Pakistan Journal of Statistics and Operation Research 12, no. 1 (March 2, 2016): 101-109. Accessed August 2, 2025. https://pjsor.com/pjsor/article/view/1153.