PHO, Nguyen Van; XUAN, Pham Tich; DANG, Pham Thanh. Occurrence of supergene nickel ores in the Ha Tri Massive, Hoa An District, Cao Bang Province. <b>Vietnam Journal of Earth Sciences</b>, <i>[S. l.]</i>, v. 40, n. 2, p. 153–164, 2018. DOI: 10.15625/0866-7187/40/2/11676. Disponível em: http://vjes.vast.vn/jse/article/view/11676. Acesso em: 8 nov. 2025.