1. The Global Horseracing Industry: Social, Economic, Environmental and Ethical Perspectives;Albrecht,2012
2. BHA Equine Injuries and Fatalities data for 2017 [WWW Document], n.d. URL https://www.britishhorseracing.com/wp-content/uploads/2018/01/Equine-Injuries-and-Fatalities-2017-data-.pdf (accessed 9.19.18).
3. Effects of increasing environmental complexity on the physical activity of broiler chickens;Bizeray;Appl. Anim. Behav. Sci.,2002
4. Visual pigments of rods and cones in a human retina;Bowmaker;J. Physiol. (Paris),1980
5. Visual Perception;Bruce,2003