Tonnayopas, D., K. Kooptarnond, and M. Masae. “Novel Ecological Tiles Made With Granite Fine Quarry Waste and Oil Palm Fiber Ash”. Science & Technology Asia, vol. 14, no. 1, Jan. 2014, pp. 10-20, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/15862.