TY  - RPRT
TI  - Spatial aggregation in gravity models; pt. 3, two-dimensional trip distribution and location models.
AU  - M Batty
AU  - P K Sikdar
PY  - 1982
DO  - 10.1068/a140629
UR  - https://pubmed.ncbi.nlm.nih.gov/12265116/
ID  - 12265116
ER  -