@misc{indiciaed42914424b20,
  title = {Altruism: its characteristics and evolution.},
  author = {P J Darlington},
  year = {1978},
  doi = {10.1073/pnas.75.1.385},
  url = {https://pubmed.ncbi.nlm.nih.gov/272654/},
  note = {Source identifier: 272654}
}