1. USEPA. Risk Assessment Guidance for Superfund (RAGS): Volume I. Human Health Evaluation Manual (Part A), 1989; available at
http://www.epa.gov/oswer/riskassessment/ragsa/pdf/rags_a.pdf
.
2. USEPA. Supplemental Guidance to RAGS: Calculating the Concentration Term. Environmental Protection Agency: Washington, DC, USA 1992.
3. USEPA. Risk Assessment Guidance for Superfund (RAGS): Volume III — Part A, Process for Conducting Probabilistic Risk Assessment 2001 available at
http://www.epa.gov/oswer/riskassessment/rags3adt/pdf/rags3adt_complete.pdf
.
4. Meek M, Boobis A, Crofton K, Heinemeyer G, Van Raaij M, Vickers C . Risk assessment of combined exposure to multiple chemicals: a WHO/IPCS framework. Regul Toxicol Pharmacol 2011; 60 (Suppl 2): S1–S14.
5. OECD OfEC-oaD. WHO OECD ILSI/HESI International Workshop on Risk Assessment of Combined Exposures to Multiple Chemicals Workshop Report, 2011; available at
http://search.oecd.org/officialdocuments/displaydocumentpdf/?cote=env/jm/mono(2011)10&doclanguage=en
.