1. The Nature of Suffering and the Goals of Medicine;Cassell,1991
2. Physical Therapy and Massage for the Horse;Denoix,2001
3. Aging: A Natural History;Ricklefs,1995
4. Effects of aging and twelve weeks of training on aerobic performance and plasma β-endorphin and cortisol concentrations in horses;McKeever,2001
5. Endocrine response to exercise in young and old horses;McKeever;Equine Vet J Suppl,1999