@misc{indiciaeb441597db350,
  title = {Evolution of cooperation: two for one?},
  author = {Martin Ackermann and Lin Chao},
  year = {2004},
  doi = {10.1016/j.cub.2003.12.049},
  url = {https://pubmed.ncbi.nlm.nih.gov/14738754/},
  note = {Source identifier: 14738754}
}