“AN EOQ MODEL FOR NON-INSTANTANEOUS DETERIORATING ITEMS WITH TWO PHASE DEMAND RATES AND TWO-LEVEL PRICING STRATEGIES UNDER TRADE CREDIT POLICY”., TNAMP, vol. 17, pp. 117–130, Dec. 2021, Accessed: Jun. 26, 2024. [Online]. Available: https://nampjournals.org.ng/index.php/tnamp/article/view/204