G.M. Jones, E.E. Wildman, H.F. Troutt, T.N. Lesch, P.E. Wagner, R.L. Boman, N.M. Lanning,
Metabolic Profiles in Virginia Dairy Herds of Different Milk Yields Journal of Dairy Science. ,vol. 65, pp. 683- 688 ,(1982) ,
10.3168/JDS.S0022-0302(82)82251-0