By Noser R.   Gygax L.   Tobler I.   in Behavioural Brain Research

ISSN:0166-4328|147|1|9-15

Elsevier‎(2003)‎

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By Vögeli S   Wechsler B   Gygax L   in Animal Welfare

ISSN:0962-7286|23|3|267-274

Universities Federation for Animal Welfare‎(2014)‎

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By Gygax L   Mayer C   Westerath H Schulze   Friedli K   Wechsler B   in Animal Welfare

ISSN:0962-7286|16|2|205-208

Universities Federation for Animal Welfare‎(2007)‎

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