Gaballah, I., M. Djona, F. García-Carcedo, S. Ferreira, and D. Siguín. 1995. “Recovery of the Metals Contained in Spent Catalysts Using a Thermal Treatment Followed by a Selective Chlorination”. Revista De Metalurgia 31 (4):215-21. https://doi.org/10.3989/revmetalm.1995.v31.i4.952.