Ibrahim, Yousif Munadhil, et al. “Integrating Sustainable Maintenance into Sustainable Manufacturing Practices and Its Relationship With Sustainability Performance: A Conceptual Framework”. International Journal of Energy Economics and Policy, vol. 9, no. 4, June 2019, pp. 30-39, https://econjournals.org.tr/index.php/ijeep/article/view/7709.