The limits of endowment effects in great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, Pongo pygmaeus)
Journal of Comparative Psychology (2011) - Comment
pubmed: 21767009  doi: 10.1037/a0024516  issn: 1939-2087  issn: 0735-7036 

Patricia Kanngiesser, Laurie R. Santos, Bruce M. Hood, Josep Call