Simaung, N., S. Rukzon, and P. Chindaprasirt. “Effect of Temperature and Delay Time for Curing on Compressive Strength of Geopolymer Mortar Ground Fly ash”. Recent Science and Technology, vol. 13, no. 2, July 2021, pp. 369-81, https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/240891.