Srisittipokakun, N., N. Singkiburin, and J. Kaewkhao. “Study properties of Cr2O3 doped in glasses prepared from sugar cane ash”. Interdisciplinary Research Review, vol. 14, no. 3, July 2019, pp. 16-19, https://ph02.tci-thaijo.org/index.php/jtir/article/view/205129.