1. Removal of iron–nickel–cobalt solutions by precipitation and solvent extraction techniques;Agatzini,1986
2. The extraction of iron (III) from aqueous sulphate solutions by primene 81R sulphate;Alguacil;Hydrometallurgy,1986
3. The influence of the diluent on the extraction of iron (III) from aluminium sulphate solutions by the amine primene 81R sulphate;Alguacil;Hydrometallurgy,1987
4. Almeida, J.A.B., 1988. O processo da jarosite na ausência de neutralizantes. Ph.D. Thesis, LNETI, Lisbon
5. Arregi, V., Gordon, A.R., Steintveit, G., 1980. The jarosite process––past, present and future. In: Cigan, J.M., Mackey, T.S., O’Keefe, T.J. (Eds.), Lead–Zinc–Tin’80, TMS–AIME World Symposium on Metallurgy and Environment Control, Warrendale, PA, pp. 97–123