Ibrahim , Musa Alhaji, et al. “Grey Based Taguchi Optimization Method for Abrasive Wear Appraisal of Fibre-Reinforced PTFE Composites ”. International Journal of Integrated Engineering, vol. 15, no. 7, Dec. 2023, pp. 145-56, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/12227.