@misc{indiciaef50d59d31286,
  title = {A note on a 'close pairs' test for space clustering.},
  author = {P G Smith and M C Pike},
  year = {1974},
  doi = {10.1136/jech.28.1.63},
  url = {https://pubmed.ncbi.nlm.nih.gov/4816591/},
  note = {Source identifier: 4816591}
}