R. O. O. Akalonu , Tran., “Inventory Periodic Review Model (nq, R, T) With Quadratic Backorder Costs”, int.jour.sci.res.mana, vol. 2, no. 9, Aug. 2014, Accessed: Aug. 18, 2025. [Online]. Available: https://ijsrm.net/index.php/ijsrm/article/view/984