Madugu, A. A., Bature, B., Idris, I. M. and Lawal, M. M. (2023) “An Order Quantity Model for Delayed Deteriorating Items with Time-varying Demand Rate and Holding Cost, Complete Backlogging Rate and Two-level Pricing Strategies under Trade Credit Policy”, UMYU Scientifica, 2(3), pp. 165–180. doi: 10.56919/usci.2323.022.