References
- Cox, K.R., 1972: Man, Location and Behaviour: An Introduction to Human Geography, New York.
- Goodchild, M.F. and B.H. Massam, 1969: Some Leastcost Models of Spatial Administration Systems in Southern Ontario, Geografiska Annaler, 52B, 86–94.
- Haggett, P., 1966: Locational Analysis in Human Geography, New York.
- Massam, B.H., 1972: The Spatial Structure of Administrative Systems, Washington: AAG Resource Paper No. 12.