@misc{indiciaef69e2b34dd89,
  title = {Spatial aggregation in gravity models; pt. 3, two-dimensional trip distribution and location models.},
  author = {M Batty and P K Sikdar},
  year = {1982},
  doi = {10.1068/a140629},
  url = {https://pubmed.ncbi.nlm.nih.gov/12265116/},
  note = {Source identifier: 12265116}
}