East, NE. 1993. Accidental superphosphate fertilizer poisoning in pregnant ewes. J Am Vet Med Assoc. 1993, Vol. 203, 8, pp. 1176-7.
Moffat, AC, Osselton, MD et Widdop, B. 2004. Clarke's analysis of drugs and poisons in pharmaceuticals, body fluids and postmortem material, third edition. 3rd edition. London : Pharmaceutical Press, 2004. p.2101.
Plumlee, KH. 2004. Clinical Veterinary Toxicology. Saint-Louis : Mosby, 2004. p.477.