1. Banach , M. Evans , J. W. 1981 Effects of inadequate energy during gestation and lactation on the estrous cycle and conception rates of mares Proc 7th equine Nutr. Phys. Symp 97
2. La Morphogénèse de l'encéphale chez le cheval;Barone;Bull. Soc. Sci. Vet. Lyon.,195657
3. Bergin , W. C. Gier , H. T. Frey , R. A. Marion , G. B. 1967 Developmental horizons and measurements useful for age determination of equine embryos and foetuses Proc. 13th Ann. Conv. Am. Ass. equine Pract. New Orleans 179 196
4. The significance of the XO syndrome in infertility in the mare;Blue;New Zealand vet. J.,1978