De Bont J, Van Aken D, Vercruysse J, Fransen J, Southgate V R, Rollinson D
Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Sri Lanka.
J Vet Pharmacol Ther. 1989 Dec;12(4):455-8. doi: 10.1111/j.1365-2885.1989.tb00698.x.