Pham, Minh, Hieu Pham, and Hoang Nguyen. “Geochemical Characteristics of the Muong Hum Alkaline Granite in the Phan Si Pan Zone, Northwestern Vietnam”. Science and Technology Development Journal - Natural Sciences 1, no. T2 (June 30, 2017): 114-123. Accessed November 21, 2019. http://stdjns.scienceandtechnology.com.vn/index.php/stdjns/article/view/451.