Durumin Iya, Sani Garba, Mohamad Zaky Noh, Siti Noraiza Ab Razak, and Nur Azureen Alwi Kutty. “Physical and Mechanical Properties of Porcelain Formed by Substituting Quartz With HCl Treated Palm Oil Fuel Ash”. Journal of Science and Technology 9, no. 3 (December 28, 2017). Accessed July 3, 2024. https://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/2199.