HUONG, Le Thi Thu; HAEGER, Tobias; PHAN, The-Long. Study of impurity in blue spinel from the Luc Yen mining area, Yen Bai province, Vietnam. <b>Vietnam Journal of Earth Sciences</b>, <i>[S. l.]</i>, v. 40, n. 1, p. 47–55, 2018. DOI: 10.15625/0866-7187/40/1/10915. Disponível em: http://vjes.vast.vn/jse/article/view/10915. Acesso em: 8 nov. 2025.