Pantong, J., Y. Pannengpetch, V. Vichai, and S. Promjak. “An Analytical Study on Values of Gemstone in the Buddhist Art Works”. Journal of Prajna Ashram, vol. 5, no. 2, Nov. 2023, pp. 38-47, https://so09.tci-thaijo.org/index.php/jpar/article/view/2908.