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Spontaneous Altruism by Chimpanzees and Young Children
Warneken F,
Hare B,
Melis AP,
Hanus D,
Tomasello M
(2007)
Spontaneous Altruism by Chimpanzees and Young Children.
PLOS Biology 5(7): e184.
https://doi.org/10.1371/journal.pbio.0050184