6D.E. Otterby, J.G. Linn. Advances in nutrition and management of calves and heifers[J]. J Dairy Sei., 1981,64:1365-1377.
7McKnight, D.R.Perfonnance of newborn dairy calves in hutch housing[J]. Can.J.Anim.Sci.,1978,58:517.
8Muller L D, M. J. Owens. Fifteen years experience with calf hutches. Hoard's Dairyman 1976,121:1107.
9M. A. Razzaque, D. Scharp, M. Bedair, et al. Field and laboratory investigation of calf mortality in Kuwait: Studies on causes of calf mortality. Kuwait Institute for Scientific Research, Report No. KISR5722,Kuwait. 1999.
10Appleman R D, F.G.Owen. Recent advances in Calf rearing:, breed- ing,housing, and feeding managementJ.Dairy Sci.,1975, 58:447,.