@misc{indiciae2d5a7e724a48,
  title = {Primer: altruism.},
  author = {Karl Sigmund and Christoph Hauert},
  year = {2002},
  doi = {10.1016/s0960-9822(02)00797-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/11967164/},
  note = {Source identifier: 11967164}
}