TAN, JIREH, and Zalipah Jamellodin. “A Review of Geopolymer Bricks and Concrete Containing Fly Ash and Palm Oil Fuel Ash”. Recent Trends in Civil Engineering and Built Environment 3, no. 1 (July 17, 2022): 1752–1764. Accessed May 5, 2024. https://publisher.uthm.edu.my/periodicals/index.php/rtcebe/article/view/2974.