De Kock SS, Rodgers JP, Swanepoel BC, Guthrie AJ: 2001. Administration of bovine, porcine and equine growth hormone to the horse: Effect on insulin-like growth factor-I and selected IGF binding proteins. Journal of Endocrinology, 171, pp 163-171.

Schulman ML, Nurton JP, Guthrie AJ: 2001. Use of the Accusport semi-automated analyser to determine blood lactate as an aid in the clinical assessment of horses with colic. Journal of the South African Veterinary Association/Tydskrif van die Suid-Afrikaanse Veterinêre Vereeniging, 72(1), pp 12-17.

Takai S, Henton MM, Picard JA, Guthrie AJ, Fukushi H, Sugimoto C: 2001. Prevalence of virulent Rhodococcus equi in isolates from soil collected from two horse farms in South Africa and restriction fragment length polymorphisms of virulence plasmids in the isolates from infected foals, a dog and a monkey. Onderstepoort Journal of Veterinary Research, 68, pp 105-110.