Umar, Babani Abdullahi, Zaharaddini Haruna Musa, Sadiq Abubakar Gambo, and Isah Abduulmumin Lurwanu. “An Inventory Model for Delayed Deteriorating Items With Lead Time and Quadratic Time Dependent Holding Cost”. Journal of Science Research and Reviews 2, no. 3 (August 18, 2025): 90–94. Accessed November 18, 2025. https://josrar.esrgngr.org/index.php/josrar/article/view/49.