Chi, C. T., J. W. Geissman, H. V. Quy, N. T. P. Dung, and N. T. Hoc. “New Paleomagnetic Results of Upper Permian - Lower Triassic Volcanic Sequences from the Hoa Binh Area, Northwest Vietnam”. Vietnam Journal of Earth Sciences, vol. 36, no. 4, Dec. 2014, pp. 413-2, doi:10.15625/0866-7187/36/4/6429.