Loon, L. Y., Ahmad Zaidi, A. M., Boon, K. H., Sulaiman, S., Adnan, S. H., & Rahman, I. (2011). Carbonation and Water Permeability of Foamed Concrete. International Journal of Sustainable Construction Engineering and Technology, 1(1), 33-46. https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/48