Related references
Note: Only part of the references are listed.Grooming reciprocation among female primates: a meta-analysis
Gabriele Schino et al.
BIOLOGY LETTERS (2008)
Giving is self-rewarding for monkeys
Frans B. M. de Waal et al.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2008)
Grooming in Barbary macaques: better to give than to receive?
Kathryn Shutt et al.
BIOLOGY LETTERS (2007)
Behavioural and hormonal responses to predation in female chacma baboons (Papio hamadryas ursinus)
AL Engh et al.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES (2006)