@article{4151,
  author = {Fu and CE Tarnita* and NA Christakis and Wang and DG Rand and MA Nowak},
  title = {Evolution of in-group favoritism.},
  year = {2012},
  journal = {Nature Scientific Reports},
  volume = {doi:10.1038/srep00460},
  pages = {*joint first authors},
  language = {eng},
}