Chí, Nguyễn Trung, and Nguyễn Thùy Dương. “Nguồn gốc Syenit Nephelin Đông Bắc Việt Nam”. Vietnam Journal of Earth Sciences 31, no. 1 (April 1, 2009): 73–84. Accessed November 8, 2025. http://vjes.vast.vn/jse/article/view/9671.