Bui, Ngoc, and Hoang Nguyen. “Mineralogical Characteristics and the Gem Quality of Corundum in Khe Tre Area, Eakar, Daklak”. VNUHCM Journal of Science and Technology Development 18, no. 4 (December 30, 2015): 55-66. Accessed May 1, 2025. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/928.