1. The domestic horse. The evolution, development and management of its behaviour;Mills,2005
2. Korries OC. Untersuchung pferdehaltender Betriebe in Niedersachsen. Bewertung unter dem Aspekt der Tiergerechtheit bei Trennung in verschiedene Nutzungsgruppen und Beachtung haltungsbedingter Schäden [Examination of equine husbandry in Lower Saxony. Evaluation with regard to the species-specific needs of horses, differentiating between different uses and under consideration of the health damage caused by housing]. [PhD thesis]. Germany: University of Veterinary Medicine Hanover; 2003.
3. The effects of exercise deprivation on the behavior and physiology of straight stall confined pregnant mares;Houpt;Anim Welfare,2001
4. A note on the relationship between time spent in turnout and behaviour during turnout in horses (Equus caballus);Chaya;Appl Anim Behav Sci,2006
5. The behaviour and social organization of the New Forest Ponies;Tyler;Anim Beh Monogr,1972