Okamura, K., K. Watanabe, K. Yonezu, Huyen Dang, Du Do, and Tu Tran. “Geochemical Behavior of REE Associated With Laterization Process in Daklak Province, Southern Viet Nam”. Science and Technology Development Journal 17, no. 3 (September 30, 2014): 69-75. Accessed July 3, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1477.