Paulino, J. F., Afonso, J. C., Mantovano, J. L., Vianna, C. A., & Cunha, J. W. S. D. (2015). Recovery of Tungsten by liquid-liquid extraction from a Wolframite concentrate after fusion with sodium hydroxide. Instituto De Engenharia Nuclear: Progress Report, (1), 92. Recuperado de https://revistas.ien.gov.br/index.php/ienprogressreport/article/view/46