1. IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. Overall Evaluations of Carcinogenicity. Supplement 7, 1987.
2. Thirty-fourth Report of the Joint FAO/WHO Expert Committee on Food Additives. Evaluation of Certain Veterinary Drug Residues in Food, World Health Organisation, Geneva, 1989.
3. Establishment of maximum residue levels of veterinary medical products in foodstuffs of animal origin, Council Regulation (EEC) no. 2377/90, Off. J. Eur. Commun. L224 (1990).
4. Animal Medicinal Drug Use Clarification Act of 1994. http://www.fda.gov/cvm/amducatoc.htm.