7Reis A, Rooke JA, McCallum GJ, et al. Consequences of exposure to serum, with or without vitamin E supplementation, in terms of the fatty acid content and viability of bovine blastocysts produced in vitro. Reprod Fertil Dev,2003,15 (5) :275 - 284.
8Roche JF. The effect of nutritional management of the dairy cow on reproductive efficiency. Anim Reprod Sci, 2006,96(3 -4) :282 -296.
9Wilde D. Influence of macro and micro minerals in the periparturient period on fertility in dairy cattle. Anim Reprod Sci, 2006,96(3 -4) :240 -249.
10LeBlanc SJ, Herdt TH, Sevmour WM, et al. Peripartum serum vitamin E, retinol, and beta - carotene in dairy cattle and their associations with disease. J Dairy Sci,2004,87(3) :609 -619.
