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de Kort, S.R., N.J. Emery & N.S. Clayton (2006). Food sharing in jackdaws, Corvus monedula: what why and with whom?. Animal Behaviour, 72 (2), 297-304. [1]. Gearchiveerd op 24 september 2015.
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de Kort, S.R., N.J. Emery & N.S. Clayton (2006). Food sharing in jackdaws, Corvus monedula: what why and with whom?. Animal Behaviour, 72 (2), 297-304. [1]. Gearchiveerd op 24 september 2015.