Rodríguez-Viamonte, M. K., L. O. Lobaina-Eduardo, and L. M. E. Prieto-Breffe. “OBTAINING COOPER SULFIDE AND BETTER QUALITY MIXED SULFIDE NI + CO”. Chemical Technology, Vol. 31, no. 1, Feb. 2016, pp. 53-62, doi:10.1590/2224-6185.2011.1.%x.