Khamput, P. ., S. . Tantavoranart, and kiatsuda somna. “The Effect of Radon Gas Volume and Solutions of Construction Material Products as Building Envelopes”. Frontiers in Engineering Innovation Research, vol. 20, no. 1, June 2022, pp. 93-104, https://ph01.tci-thaijo.org/index.php/jermutt/article/view/248547.