"Breed description". The Australian & New Zealand Friesian Horse Society Inc. Archived from the original on March 9, 2018. Retrieved November 26, 2017.
books.google.com
Back, Willem; Clayton, Hilary M. (2013). Equine Locomotion. Elsevier Health Sciences. p. 718. ISBN9780702052934. Retrieved July 15, 2016.
"Breed description". The Australian & New Zealand Friesian Horse Society Inc. Archived from the original on March 9, 2018. Retrieved November 26, 2017.