1. Feb. Regist., 53 FR 9492, March 23 1988, NCTR Technical Report Experiment Number 418, March 1988, NCTR, Jefferson, AR 72079.
2. Commission of the European Communities, Establishment by the European Community of maximum residue limits (MRLs) for residues of veterinary medical products in foodstuffs of animal origin, The rules governing medical products in the European Community VI, October 1991, ECSC-EEC-EAEC, Brussels.
3. WHO Technical Report Series No. 799, 36th Report of the Joint FAO/WHO Expert Committee on Food Additives, WHO, Switzerland, 1990.
4. FAO Food and Nutrition Papers 41/4, 1991, Residues of some veterinary drugs in animal and foods, Monographs prepared by the Thirty-eighth Meeting of the Joint FAO/WHO Expert Committee on Food Additives, January, Rome.
5. FDA/CVM: General principles for evaluating the safety of compounds used in food producing animals, FDA guideline.