@misc{indiciaea67f87945c18,
  title = {Spatial aggregation in gravity models: 2. One-dimensional population density models.},
  author = {M Batty and P K Sikdar},
  year = {1982},
  doi = {10.1068/a140525},
  url = {https://pubmed.ncbi.nlm.nih.gov/12265195/},
  note = {Source identifier: 12265195}
}