References
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- Petherick, J.C., 1983. In: Baxter, S.H., Baxter, M.R., MacCormack, J.A.C., (eds), Farm Animal housing and Welfare, Martinus Nijhof, Dordrecht, pp103–120.
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- Spoolder, H.A.M., Edwards, S.A., Corning, S., 2000. Livest. Prod. Sci. 64:167–173.