Niên, B. Ấn, Hòa, T. T., Anh, T. T., Hiếu, T. V., Cẩn, P. N., & Hùng, T. Q. (2013). Distribution characteristics, the dissemination and quality of the fine arts and decorative rocks in the centre of Vietnam. Vietnam Journal of Earth Sciences, 34(4), 495–505. https://doi.org/10.15625/0866-7187/34/4/2809