S. G. Durumin Iya, M. Z. Noh, S. N. Ab Razak, and N. A. Alwi Kutty, “Physical and Mechanical Properties of Porcelain Formed by Substituting Quartz with HCl Treated Palm Oil Fuel Ash”, jst, vol. 9, no. 3, Dec. 2017, Accessed: Jul. 18, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/2199