G.S., Gingos, and Mohamed Sutan N. “Effect of PFA on Strength and Water Absorption of Mortar”. Journal of Civil Engineering, Science and Technology 2, no. 1 (March 1, 2011): 7-11. Accessed April 23, 2024. https://publisher.unimas.my/ojs/index.php/JCEST/article/view/81.