PERMANA, S.; VINCIA, S. F.; AMILIA, A.; MAKSUM, A.; WIDANA, K. S.; SOEDARSONO, J. W. Enrichment on Bangka tin slag’s tantalum and niobium oxide contents through non-fluoride process. Eastern-European Journal of Enterprise Technologies, [S. l.], v. 5, n. 12 (95), p. 56–64, 2018. DOI: 10.15587/1729-4061.2018.129914. Disponível em: https://journals.uran.ua/eejet/article/view/129914. Acesso em: 6 may. 2024.