@misc{indiciae539d4780d7b5,
  title = {Spatial aggregation in gravity models; pt. 1, an information- theoretic framework.},
  author = {M Batty and P K Sikdar},
  year = {1982},
  doi = {10.1068/a140377},
  url = {https://pubmed.ncbi.nlm.nih.gov/12313536/},
  note = {Source identifier: 12313536}
}