Evolutionary constraints on equid domestication: Comparison of flight initiation distances of wild horses (Equus caballus ferus) and plains zebras (Equus quagga)
Journal of Comparative Psychology (2015) - Comment
pubmed: 26348970  doi: 10.1037/a0039677  issn: 1939-2087  issn: 0735-7036 

Alexali S. Brubaker, Richard G. Coss