N. Oh Lai Ching, “Taguchi design and flower pollination algorithm application to optimize the EMI shielding of plaster mortar containing palm oil fuel ash”, ijie, vol. 10, no. 3, Jul. 2018, Accessed: May 07, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2109