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Author (up) Title Year Publication Serial Volume Pages
Vokey, J.R.; Rendall, D.; Tangen, J.M.; Parr, L.A.; de Waal, F.B.M. Visual kin recognition and family resemblance in chimpanzees (Pan troglodytes) 2004 Journal of comparative psychology (Washington, D.C. : 1983) 171 118 194-199
Zentall, T.R.; Klein, E.D.; Singer, R.A. Evidence for detection of one duration sample and default responding to other duration samples by pigeons may result from an artifact of retention-test ambiguity 2004 Journal of experimental psychology. Animal behavior processes 232 30 129-134