@misc{indiciaec2bad8d10bcb,
  title = {Evolution of social behavior through interpopulation selection.},
  author = {M Gadgil},
  year = {1975},
  doi = {10.1073/pnas.72.3.1199},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592228/},
  note = {Source identifier: 16592228}
}