1. Removal of Ferric Iron as Hematite at Atmospheric Pressure. International Publication Number, WO2013188922 A1;Aguilar,2013
2. CESL process-an economic alternative to smelting;Barr,2005
3. Iron control and management in the zinc industry;Beaulieu,2006
4. Sorption of copper and zinc by goethite and hematite;Bekényiová;Arch. Tech. Sci.,2015
5. Volaschioite, Fe4(SO4)O2(OH)6·2H2O, a new mineral species from Fornovolasco, Apuan Alps Tuscany, Italy;Biagioni;Can. Mineral.,2011