@misc{indiciaed0760e6e476c,
  title = {Infrahuman altruism.},
  author = {D Krebs},
  year = {1971},
  doi = {10.1037/h0020020},
  url = {https://pubmed.ncbi.nlm.nih.gov/5004474/},
  note = {Source identifier: 5004474}
}