By Berg C   Yngvesson J   Nimmermark S   Sandström V   Algers B   in Animal Welfare

ISSN:0962-7286|23|4|445-457

Universities Federation for Animal Welfare‎(2014)‎

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By Yngvesson J.   Keeling L.J.   in Animal Behaviour

ISSN:0003-3472|61|3|609-615

Elsevier‎(2001)‎

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By Yngvesson J.   Keeling L.J.   Newberry R.C.   in British Poultry Science

ISSN:1466-1799|45|4|453-462

Taylor & Francis Ltd‎(2004)‎

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