Huong, L. T. T., Haeger, T., & Phan, T.-L. (2018). Study of impurity in blue spinel from the Luc Yen mining area, Yen Bai province, Vietnam.
Vietnam Journal of Earth Sciences
,
40
(1), 47–55. https://doi.org/10.15625/0866-7187/40/1/10915