Suwansulroad, N., S. Sian-un, S. Kosirimong Kol, and S. Gophra. “Properties of Concrete Which Use Foam Instead of Coarse Aggregate”. Engineering and Applied Science Research, vol. 23, no. 1, Apr. 2013, pp. 181-9, https://ph01.tci-thaijo.org/index.php/easr/article/view/8087.