1. Organisation for Economic Co-operation and Development 2002 http://www.olis.oecd.org/olis/2002doc.nsf/LinkTo/NT00000B8A/$FILE/JT00128856.PDF
2. U.S. Food and Drug Administration 2002 http://www.fda.gov/cber/gdlns/dose.pdf
3. U.S. Food and Drug Administration 2010 http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/ucm073246.pdf
4. Presenting Toxicology Results