^“Evaluation of certain veterinary drug residues in food. Fiftieth report of the joint FAO/WHO Expert Committee on Food Additives”. World Health Organ Tech Rep Ser. 888: i–vii, 1–95. 1999. PMID10416362.
^Gingerich, WH.; Stehly, GR.; Clark, KJ.; Hayton, WL. (1998). “Crop grouping: a proposal for public aquaculture”. Vet Hum Toxicol. 40 Suppl 2: 24–31. PMID9823579.