Parga, J. R., and F. R. Carrillo. “Advances in the Methods for Gold and Silver Recovery from Refractory Ores”. Revista de Metalurgia 32, no. 4 (August 30, 1996): 254–261. Accessed April 26, 2024. https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/907.