7Drackley J K. Metabolic changes in dairy cows with ketonemia in response to feed restriction and dietary 1,3-butanediol[J], Dairy Sci, 1992,75 : 1622- 1634.
8Kremer W D. Severity of experimental Escheriehia coli mastitis in ketonemia and nonketonemic dairy cows[J]. Dairy Sci, 1993,76 : 3428-3436.