Omar, Mohd, and Siti Suzlin Supadi. 2008. “An Integrated Production System for a Single Installment Policy of Raw MaterialThis Paper Considers a Manufacturing System Which Procures Raw Materials from Suppliers and Processes Them to Make a Finished Product. The Problem Is to Determine an Optimal Pr”. Malaysian Journal of Science 27 (1):143-51. https://mjs.um.edu.my/index.php/MJS/article/view/7943.