Bullanday, J. J. A., and J. Galupo Opon. “Desirability analysis of Commercial-off-the-shelf (COTS) alternative foaming agents for foamed concrete production”. Engineering and Applied Science Research, vol. 51, no. 2, Mar. 2024, pp. 235-47, https://ph01.tci-thaijo.org/index.php/easr/article/view/254106.