Riegal, Ronald J. DMV, and Susan E. Hakola DMV. Illustrated Atlas of Clinical Equine Anatomy and Common Disorders of the Horse Vol. II. Equistar Publication, Limited. Marysville, OH. Copyright 2000.
Montgomery, E.S, "The Thoroughbred", Arco, New York, 1973 ISBN 0-668-02824-6
AJC & VRC, "Australian Stud Book", Vol. 31, Ramsay Ware Stockland Pty. Ltd., North Melbourne, 1980
Stratton, Charles, The International Horseman's Dictionary, Lansdowne Press, Melbourne, 1978, ISBN 0-7018-0590-0
Summerhayes, RS, Encyclopaedia for Horsemen, Warne & Co, London & New York, 1966
De Bourg, Ross, "The Australian and New Zealand Thoroughbred", Nelson, West Melbourne, 1980, ISBN 0-17-005860-3
Napier, Miles, "Blood Will Tell", JA Allen & Co, London, 1977
The Australian Racing Board uses August 1 as its standard cutoff date, but also uses the date of conception to determine age. A foal born on or after July 1 of a given calendar year is included in the birth cohort of that calendar year if his or her dam was covered no later than August 31 of the previous calendar year. See "Rule AR.46" (PDF). Australian Rules of Racing. 2009-09-29. Truy cập 2010-08-03.
Hura, V; et al. (October 1997). "The effect of some factors on gestation length in nonius breed mares in Slovakia (Egyes tényezõk hatása a nóniusz fajta vemhességének idõtartamára)". Proceedings of Roundtable Conference on Animal Biotechnology. XIII. Truy cập 2008-04-22.
Mortensen C, Choi YH, Hinrichs K, Ing N, Kraemer D, Vogelsang S, Vogelsang M. 2006. Effects of exercise on embryo recovery rates and embryo quality in the horse. Animal Repro. Sci. 94:395-397
Preparation for Foaling by Brad Dowling BVSc MVetClinStud FACVSc Retrieved 2011-2-7
Delbridge, Arthur, "The Macquarie Dictionary", 2nd ed., Macquarie Library, North Ryde, 1991, p. 1274
Lewis, Barbara S. "Egyptian Arabians: The Mystique Unfolded". Arabians. Pyramid Arabians. Truy cập 2006-05-10.
McGreevy, Paul. Equine Behaviour - A Guide For Veterinarians and Equine Scientists.[full citation needed]
Section V, Rule 1, Part D, The American Stud Book Principal Rules and Requirements. The Jockey Club, 2011. Truy cập 2011-02-15.
See Rule AR.15C, Australian Rules of Racing, which explicitly prohibits human manipulation of the breeding process.
Rule 26, Section 6, Rules and Regulations of the United States Trotting Association 2009. United States Trotting Association, 2009. Truy cập 2011-02-15.
