@misc{indiciaec6c7def7538e,
  title = {Phenomena associated with population density.},
  author = {J J CHRISTIAN},
  year = {1961},
  doi = {10.1073/pnas.47.4.428},
  url = {https://pubmed.ncbi.nlm.nih.gov/13693391/},
  note = {Source identifier: 13693391}
}