Lees M J, Read R A, Klein K T, Chennel K R, Clark W T, Weldon A
Division of Applied Veterinary Medicine, School of Veterinary Studies, Murdoch University, Western Australia.
Equine Vet J. 1989 Sep;21(5):384-7. doi: 10.1111/j.2042-3306.1989.tb02699.x.