Loon, Lee Yee, Ahmad Mujahid Ahmad Zaidi, Koh Heng Boon, Suhaizad Sulaiman, Suraya Hani Adnan, and Ismail Rahman. “Carbonation and Water Permeability of Foamed Concrete”. International Journal of Sustainable Construction Engineering and Technology 1, no. 1 (May 26, 2011): 33–46. Accessed May 1, 2024. https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/48.