Okponyia, K. O. ., and S. A. Oke. “Process Optimisation Regarding Overall Equipment Effectiveness of Tyre Manufacturing using Response Surface Methodology and Grey Relational Analysis: doi: 10.14456/mijet.2021.17”. Engineering Access, vol. 7, no. 2, May 2021, pp. 109-25, https://ph02.tci-thaijo.org/index.php/mijet/article/view/243322.