Zago, D. M., S. S. Jikan, N. A. Badarulzaman, S. Yahaya, and A. H. Nuhu. “Effect of Additives on Polypropylene/Kaolin Composite Prepared via In-Situ Process”. Journal of Science and Technology, Vol. 9, no. 4, Dec. 2017, https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/2053.