By Ursinus WW   Schepers F   de Mol RM   Bracke MBM   Metz JHM   Groot Koerkamp PWG   in Animal Welfare

ISSN:0962-7286|18|4|545-552

Universities Federation for Animal Welfare‎(2009)‎

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By Bos B.   Groot Koerkamp P.W.G.   Groenestein K.   in Livestock Production Science

ISSN:0301-6226|84|2|157-170

Elsevier‎(2003)‎

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