Ighravwe, D. E., and S. A. Oke. “A Green Preventive Maintenance Model Incorporating the Green Fuzzy Deployment Method With the WASPAS Approach for Production Lines: Doi: 10.14456/Mijet.2022.3”. Engineering Access, vol. 8, no. 1, July 2021, pp. 22-30, https://ph02.tci-thaijo.org/index.php/mijet/article/view/243417.