1. Allen WR: Practical control of anestrus in thoroughbred broodmares. In: Endocrine causes of seasonal and lactational anoestrus in farm animals. Martinus Nijhof Publishers, Dordrecht 1985, pp 98–107.
2. Burkhardt J: Transition from anoestrus in the mare and the effects of artificial lighting. J. Agr. Sci. 1947, 37, 64–68.
3. Cooper WL, Wert NE: Wintertime breeding of mares using artificial light and insemination: six years’ experience. Proc. 21st Amer. Ass. Equine Pract. 1975, pp 245–253.
4. Freedman LJ, Garcia MC, Ginther OJ: Influence of photoperiod and ovaries on seasonal reproductive activity in mares. Biol. Reprod. 1979, 20, 567–574.
5. Kenney RM, Ganjam VK, Bergman R V: Non-infectious breeding problems in mares. Veterinary Scope 1975, 19, 16–24.