di Yorio, C., B. Calles, Y. Peña, F. García-Carcedo, J. N. Ayala, N. Cornejo, A. Hernández, and N. Munroe. “Study of the Flotability of Auriferous Pyrites Contained in Venezuelan by-Products from Cyaniding Processes”. Revista De Metalurgia, vol. 39, no. 5, Oct. 2003, pp. 323-9, doi:10.3989/revmetalm.2003.v39.i5.345.