A. A. Madugu, B. Bature, I. M. Idris, and M. M. Lawal, “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”, USci, vol. 2, no. 3, pp. 165–180, Sep. 2023.