Stewart SG, Johnston JK, Parente EJ Hand-assisted laparoscopic repair of a grade IV rectal tear in a postparturient mare Journal of the American Veterinary Medical Association 9: 1041, 2014.

Stephen JO, Corley KT, Johnston JK, Pfeiffer D Small intestinal volvulus in 115 horses Veterinary Surgery Journal 4: 333-339, 2004.

Stephen JO, Corley KT, Johnston JK, Pfeiffer D Factors associated with mortality and morbidity in small intestinal volvulus in horses. Veterinary Surgery Journal 4: 340-348, 2004.