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7Aoyagi S, Baker D H. Nutritional evaluation of a copper-methionine complex for chicks. Poultry-sci.Champaign. Poultry Science Association, 1993, 2(12) :2309 - 2315
8Du Z, Hemken R W, Jackson J A , et al. Utilization of copper in copper proteinate, copper lysine , and cupric sul - fate using the rat as an experimental model. Journal of Animal Science , 1996 , 74 ( 7 ) :1657 - 1663
9Aoyagi S,Baker D H.Nutritional evaluation of a copper-methionine complex for chicks.Poultry-sei.Champaign.Poultry Seienee Association,1993,2 (12):2309-2315.
10Du Z,Hernken R W,Jackson J A,et al.Utilization of copper in copper proteinate,copper lysine,and cupric sul-fate using the rat as an experimental model.Journal of Animal Science,1996,74(7):1657 -1663.
