ศรีชู ส. ., and ตั้งปกาศิต จ. . “Effect of Using Rice Husk Ash to Replace Portland Cement on Compressive Strength of Concrete Under Pressure Mold”. Journal of Engineering, RMUTT, vol. 14, no. 2, Dec. 2016, pp. 55-67, https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242014.