D. Lovera Dávila, P. Nuñez Jara, J. Zegarra Navarro, and L. Puente Santibañez, “Carbothermic reduction of chalcopyrite without polluting emission”, Rev. Inst. investig. Fac. minas metal cienc. geogr, vol. 3, no. 5, pp. 7–13, Jul. 2000, doi: 10.15381/iigeo.v3i5.2541.