Chi, Cung Thuong, John W. Geissman, Taylor Borgfeldt, and Nguyen Hoang. “Paleomagnetism of Permian-Triassic Volcanic Sequences from Son La Province, Northwest Vietnam”. Vietnam Journal of Earth Sciences 43, no. 2 (March 25, 2021): 220–235. Accessed November 8, 2025. http://vjes.vast.vn/jse/article/view/15943.