1. Comparative immunohistochemical study of oestrogen and progesterone receptors in the Fallopian tube and uterus at different stages of the menstrual cycle and the menopause;Amso;Hum. Reprod.,1994
2. Arthur, G.H., Noakes, D.E., Pearson, H., Parkinson, T., 1996. Infertility in the bitch and queen. In: Arther, G.H. (Ed.), Veterinary Reproduction and Obstretrics. W.B. Saunders, Philadelphia, pp. 527–529.
3. Barton, C., 1992. Diseases of the uterus—cystic endometrial hyperplasia–pyometra complex. In: Morgan, R.V. (Ed.), Handbook of Small Animal Practice, 2nd Edition. Churchill Livingstone, New York, pp. 655–658.
4. Hormonal state and effects of the use of an antiprogestin in bitches with pyometra;Bledinger;J. Reprod. Fertil.,1997
5. Pyometra in the dog—a pathological investigation. I. The pyometra syndrome: a review;Borresen;Nord. Veterinarmed.,1975