AUTHOR=Berra Irene 

TITLE=An evolutionary Ockham's razor to reciprocity

JOURNAL=Frontiers in Psychology

VOLUME=5

YEAR=2014

URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2014.01258

DOI=10.3389/fpsyg.2014.01258

ISSN=1664-1078