“The importance of social relationships in horses”- Machteld van Dierendonck
“Development of the Horse Grimace Scale (HGS) as a Pain Assessment Tool in Horses”
E. Dalla Costa, M. Minero, D. Lebelt, D. Stucke, E. Canali y M. C. Leach
journals.plos.org/plosone/article?id=10.1371/journal.pone.0092281
“Horses can learn to use symbols to communicate their preferences”
Authors, Cecilie M.MejdellaTuridBuvikbGrete H.M.JørgensencKnut E.Bøed
http://www.sciencedirect.com/science/article/pii/S0168159116302192