1. The rate of passage of food residues through the bowel;ALVAREZ;Journal of the American Medical Association,1924
2. The intestinal rate and the form of faeces;BURNETT;American Journal of Roentgenology,1923
3. Techniques for taking a behavioural history;CROWELL-DAVIS;Veterinary Clinics of North America: Equine Practice (Behaviour),1986
4. CUDDEFORD , D. 1995 Are there differences between horses and ponies? International Conference on Feeding Horses Northamptonshire Dodson & Horrell