Kwansirikul, Kanyarat, Panjawan Thanasuthipitak, and Theerapongs Thanasuthipitak. “EXPERIMENTAL HEAT TREATING OF TRAPICHELIKE BLUE SAPPHIRE OF SOUTHERN VIETNAM”. Suranaree Journal of Science and Technology 23, no. 4 (August 28, 2026): 409–419. accessed September 11, 2026. https://ph04.tci-thaijo.org/index.php/SUJST/article/view/14303.