• http://www.epa.gov/gateway/learn/ 

• http://chem.sis.nlm.nih.gov

• http://monographs.iarc.fr/

• http://europa.eu/legislation_summaries/environment/index_it.htm

• http://www.isprambiente.gov.it 

• http://ita.arpalombardia.it

• http://scienzacommestibile.blogspot.it/

• http://www.isoambiente.it/

• http://toxics.usgs.gov (U.S. Geological Survey – USGS)
“Principles of Environmental Toxicology” I.C.Shaw, J. Chadwick [Taylor & Francis – 1998]
“Science” G.M.Woodwell, C.F.J.Worster, P.A.Isaacson (1967)