1. ATSDR (Agency for Toxic Substances and Disease Registry) 2004 Toxicological profile for copper, update. U.S. Department of Health and Human Services; Public Health Service, Atlanta, GA, USA
2. BfR (Bundesinstitut für Risikobewertung) 2004 Verwendung von Mineralstoffen in Lebensmitteln. Toxikologische und ernährungsphysiologische Aspekte, Teil II (The addition of mineral to foods. Toxicological and nutritional-physiological aspects Part II) http://www.bfr.bund.de/cm/350/verwendung_von_mineralstoffen_in_lebensmitteln_bfr_wissenschaft_4_2004.pdf
3. Copper exposure and metal fume fever: lack of evidence for a causal relationship;Borak;Am Ind Hyg Assoc J,2000
4. Pulmonary effects of sulfur oxides on the surface of copper oxide aerosol;Chen;Am Ind Hyg Assoc J,1991
5. Comparative study of various methods used for determining health effects of inhaled sulfates;Drummond;Environ Res,1986