Ibrahim, Yousif Munadhil, Norsiah Hami, and Siti Norezam Othman. 2019. “Integrating Sustainable Maintenance into Sustainable Manufacturing Practices and Its Relationship With Sustainability Performance: A Conceptual Framework”. International Journal of Energy Economics and Policy 9 (4):30-39. https://econjournals.com/index.php/ijeep/article/view/7709.