1. International Agency for Research on Cancer Monographs (http://monographs.iarc.fr/).
2. National Toxicology Program Long-Term Study Reports (http://ntp.niehs.nih.gov/index.cfm?objectid=0847DDA0-F261-59BF-FAA04EB1EC032B61).
3. U.S. Department of Health and Human Services Public Health Service National Toxicology Program “Report on Carcinogens 11th Edition” (2004); http://ntp.niehs.nih.gov/?objectid=035E5806-F735-FE81-FF769DFE5509AF0A.
4. Istituto Ramazzini CMCRC bioassay listing (www.ramazzini.it/ricerca/publications.asp).
5. State of California Environmental Protection Agency Office of Environmental Health Hazard Assessment “Chemicals known to the state to cause cancer or reproductive toxicity” (2011); http://oehha.ca.gov/prop65/prop65_list/files/P65List031811links.pdf.