TY  - RPRT
TI  - Variability in group size and the evolution of collective action
AU  - Jorge Peña
AU  - Georg Nöldeke
PY  - 2015
DO  - 10.1101/021485
UR  - https://www.biorxiv.org/content/10.1101/021485v1
ID  - 10.1101/021485
ER  -