5Wciss,W. P. ,J. S. Hogan ,D. A. Todhunter, and K. L. Smith. Effect of vitamin E supplementation in diets with a low concentration of selenium on mammary gland health of dairy cows. J Dairy Sci, 1997, 80 : 1728 - 1737.
6St. Lament, A. M. , M. Hidiroglou, M. Snoddon, and J. W. Nicholson. Effect of a - tocopherol supplementation to dairy cows on milk and plasma a - tocopherol concentrations and on spontaneous oxidized flavor in milk. Can J Anita Sci, 1990,70:561 - 570.
7Hogan, J. S. ,W. P. Weiss, D. A. Thdhunter, K. L. SmithandP. S. Schoenberg. Bovine neutrophil responses to parenteral vitamin E. J Dairy Sci,1992,75:399 -405.
8Hogan ,J, S. , W. P. Weiss, D. A. Thdhunter , K. L. Smith and P. S. Schoenberg. 1992. Bovine neutrophil responses to parenteral vitamin E. J. Dairy Sci. 75:399 -405.
9National Research Council. 2001. Nutritional Requirements of Dairy Cattle. 7th rev. ed. Natl. Acad. Sci. , Washington, DC.
10Politis, I. , N. Hidiroglou, J. H. White, J. A. Gilmore, S. N. Williams, H. Scherf, and M. Frigg. 1996. Effects of vitamin E on mammary and blood leukocyte function, with emphasis on chemotaxis , in peripaturient dairy cows. Am. J. Vet. Res. 57:468 - 471.
