1. Allen WE. Fertility and obstetrics in the dog. Oxford: Blackwell Scientific Publications, 1992. p. 82–6.
2. Feldman EC, Nelson RW. Cystis endometrial hyperplasia/pyometra complex. Canine and feline endocrinology and reproduction. Philadelphia: W.B. Saunders, 1996. p. 605–18.
3. Barton C. Diseases of the uterus—cystic endometrial hyperplasia/pyometra complex. In: Morgan RV, editor. Handbook of small animal practice. New York: Churchill Livingstone, 1992. p. 655–8.
4. Arthur GH, Noakes DE, Pearson H, Parkinson TJ. Veterinary reproduction and obstetrics. London: W.B. Saunders, 1996. p. 527.
5. Cystic endometrial hyperplasia–pyometra complex in the bitch: should the two entities be disconnected?;De Bosschere;Theriogenology,2001