1. Ring of Fire lights up Northern Ontario's mining industry, Ontario Business Report, 2012, 〈http://www.mri.gov.on.ca/obr/2012/2007/ring-of-fire-lights-up-northern-ontarios-mining-industry/#sthash.oiV2097z2010z.dpuf〉, (accessed Jan 2015).
2. U.S. Geological Survey: mineral commodity summaries, 2014, pp. 42–43, 〈http://minerals.usgs.gov/minerals/pubs/mcs/2014/mcs2014.pdf〉, (accessed Jan 2015).
3. Chromium occurrence in the environment and methods of its speciation;Kotaś;Environ. Pollut.,2000
4. Canadian Environmental Protection Act, Government of Canada, in: Chromium and its Compounds, Ottawa, ON, 1994.
5. Trivalent chromium: assessing the genotoxic risk of an essential trace element and widely used human and animal nutritional supplement;Eastmond;Crit. Rev. Toxicol.,2008