Madugu, Aisha Ahmed, Babangida Bature, Ibrahim M. Idris, and Mustapha Malumfashi 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”. UMYU Scientifica 2, no. 3 (September 30, 2023): 165–180. Accessed November 24, 2024. https://scientifica.umyu.edu.ng/index.php/scientifica/article/view/209.