TY  - RPRT
TI  - Evolutionary perspectives on the development of social exchanges.
AU  - Brad E Sheese
AU  - William G Graziano
PY  - 2002
DO  - 10.1002/cd.38
UR  - https://pubmed.ncbi.nlm.nih.gov/11933534/
ID  - 11933534
ER  -