Sahagún A M, García J J, Sierra M, Fernández N, Diez M J, Terán M T
Department of Pharmacology, Toxicology and Nursing, Veterinary Faculty, University of León, Spain.
J Vet Pharmacol Ther. 2000 Jun;23(3):189-92. doi: 10.1046/j.1365-2885.2000.00258.x.