5HERDTH T H. Ruminant adaptation to negative energy balance:Influences on the etiology of ketosis and fatty liver[J]. Vet Clin North Am Food Anim Pract, 2000, 16:215 -230.
6HERDTH T H. Ruminant adaptation to negative energy balance: Influences ,on the etiology of ketosis and fatty liver[J]. Vet Clin North Am Food Anita Praet, 2000,16:215 - 230.
10Walsh RB,Walton JS, Keton DF,et al. The Effect of subclinical ketosis in early lactayion on reproductive performance of postpartum dairy cows[J].J Dairy Sci,2007,90(06):2788-2796.