“AN EOQ MODEL FOR NON-INSTANTANEOUS DETERIORATING ITEM WITH TWO- PHASE DEMAND RATES, TIME-DEPENDENT LINEAR HOLDING COST AND TIME- DEPENDENT PARTIAL BACKLOGGING RATE UNDER TRADE CREDIT POLICY”, TNAMP, vol. 17, pp. 131–144, Dec. 2021, Accessed: Apr. 26, 2025. [Online]. Available: https://nampjournals.org.ng/index.php/tnamp/article/view/203