TY  - RPRT
TI  - Spatial aggregation in gravity models; pt. 1, an information- theoretic framework.
AU  - M Batty
AU  - P K Sikdar
PY  - 1982
DO  - 10.1068/a140377
UR  - https://pubmed.ncbi.nlm.nih.gov/12313536/
ID  - 12313536
ER  -