Johnson E H, Windsor J J, Muirhead D E, King G J, Al-Busaidy R
Department of Animal and Veterinary Sciences, College of Agriculture, College of Medicine, Sultan Qaboos University, Muscat, Sultanate of Oman.
Vet Res Commun. 2000 Feb;24(1):63-7. doi: 10.1023/a:1006381522986.