Nurul Izzati Othman, and MOHD SUFYAN ABDULLAH. “A Study of Rice Husk Ash on the Strength of Concrete”. Progress in Engineering Application and Technology 6, no. 2 (October 16, 2025): 101–109. Accessed April 8, 2026. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/21159.