6Muirhead,Sarah. Feeding of high levels of zinc oxide found beneficed to weanling pigs [J].Feedstuffs,1992,(9):22.
7Hahn Joseph D, David H Baker.Growth and plasma zinc responses of young pigs fed pharmacologic levels of zinc. Journal of Animal Science. 1993,71:3020-3024.
8Hill G M,Crom well G L,Cremhaw T D,et al.Impact of pharmacological intakes of zinc and (or) copper on performance of weanling pigs. Journal of Animal Science. 1996,74(Suppl.1):181.
9Mccully G.A.et.al.Evaluation of zinc sources for the newly weaned pig[J].Anim.Sci. 1995,22:501-505.
10Smith ll,et al.The effect of increasing zinc oxide supplementation on starter pig growth performance[J].Anim.Sci.1995,73(suppl.1):72.
