Heard-Booth, A. N.; Kirk, E. C. (2012). "The Influence of Maximum Running Speed on Eye Size: A Test of Leuckart's Law in Mammals". The Anatomical Record. 295 (6): 1053–62. doi:10.1002/ar.22480. PMID22539450. S2CID26726269.
Heard-Booth, A. N.; Kirk, E. C. (2012). "The Influence of Maximum Running Speed on Eye Size: A Test of Leuckart's Law in Mammals". The Anatomical Record. 295 (6): 1053–62. doi:10.1002/ar.22480. PMID22539450. S2CID26726269.
Heard-Booth, A. N.; Kirk, E. C. (2012). "The Influence of Maximum Running Speed on Eye Size: A Test of Leuckart's Law in Mammals". The Anatomical Record. 295 (6): 1053–62. doi:10.1002/ar.22480. PMID22539450. S2CID26726269.
thehorse.com
McDonnell, Sue. "In Living Color." The Horse, Online edition, 1 June 2007. Web site accessed 27 July 2007 at "The Horse – Your Guide to Equine Health Care". Archived from the original on 27 September 2007. Retrieved 27 July 2007.
McDonnell, Sue. "In Living Color." The Horse, Online edition, 1 June 2007. Web site accessed 27 July 2007 at "The Horse – Your Guide to Equine Health Care". Archived from the original on 27 September 2007. Retrieved 27 July 2007.