TY  - RPRT
TI  - A method of fitting the gravity model based on the Poisson distribution.
AU  - R Flowerdew
AU  - M Aitkin
PY  - 1982
DO  - 10.1111/j.1467-9787.1982.tb00744.x
UR  - https://pubmed.ncbi.nlm.nih.gov/12265103/
ID  - 12265103
ER  -