@misc{indiciae06839b6a50d1,
  title = {Fundamental clusters in spatial 2x2 games.},
  author = {C Hauert},
  year = {2001},
  doi = {10.1098/rspb.2000.1424},
  url = {https://pubmed.ncbi.nlm.nih.gov/11321066/},
  note = {Source identifier: 11321066}
}