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9Whittemore C T, Green D M, Knap P W. Technical review of the energy and protein requirements of growing pigs : protein [J]. British, Anita. Sci. , 2001, 73 : 363-373.
10Whittemore C T, Green D M, Knap P W. Technical review of the energy and protein requirements of growing pigs: energy [J]. British, Anita. Sci. , 2001, 73:199-215.