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ISSN:1568-542X|35|1-2|279-299

Brill‎(1984)‎

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By Wiepkema P R   Koolhaas J M   in Animal Welfare

ISSN:0962-7286|2|3|195-218

Universities Federation for Animal Welfare‎(1993)‎

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By Wiepkema P R   Koolhaas J M   in Animal Welfare

ISSN:0962-7286|1|1|13-18

Universities Federation for Animal Welfare‎(1992)‎

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By Menke C   Waiblinger S   Fölsch D W   Wiepkema P R   in Animal Welfare

ISSN:0962-7286|8|3|243-258

Universities Federation for Animal Welfare‎(1999)‎

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By Kastelein R. A.   Staal C.   Wiepkema P. R.   in Aquatic Mammals

ISSN:0167-5427|29|1|53-66

European Association for Aquatic Mammals‎(2003)‎

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