%0 Journal Article %A Melis, Alicia P. %A Engelmann, Jan M. %A Warneken, Felix %+ Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society %T Chimpanzee helping is real, not a byproduct : %G eng %U https://hdl.handle.net/11858/00-001M-0000-002E-1998-8 %R 10.1038/s41467-017-02321-6 %7 2018-02-12 %D 2018 %8 12.02.2018 %* Review method: peer-reviewed %J Nature Communications %V 9 %] 615 %I Nature Publishing Group %C London %@ 2041-1723