Kamaruddin, Kartini, and Hamidah Mohd Saman. “Mechanical Properties of Rice Husk Ash As a Mineral Addition in Concrete”. Scientific Research Journal 5, no. 2 (December 31, 2008): 21–34. Accessed February 16, 2025. https://journal.uitm.edu.my/ojs/index.php/SRJ/article/view/3416.