Chen, C. T., and C. H. Chang. “Mechanical Properties of Geopolymer Produced by Rice Husk Ash Calcined at Low Temperature”. Academic Journal of Civil Engineering 37, no. 2 (June 26, 2019): 97-101. Accessed April 21, 2024. https://journal.augc.asso.fr/index.php/ajce/article/view/817.