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 July 18, 2024. https://vjs.ac.vn/index.php/jse/article/view/9671.