By Spaar R.   Stark H.   Liechti F.   in Animal Behaviour

ISSN:0003-3472|56|5|1185-1197

Elsevier‎(1998)‎

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By Erni B.   Liechti F.   Bruderer B.   in Journal of Theoretical Biology

ISSN:0022-5193|219|4|479-493

Academic Press‎(2002)‎

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