1. Rail, British. 1975. “Freight Market Background Study Report, Strategic Planning Studies”. London: British Rail. (mimeo)
2. THE DELIMITATION OF FUNCTIONAL REGIONS, NODAL REGIONS, AND HIERARCHIES BY FUNCTIONAL DISTANCE APPROACHES*
3. B, P. J. 1987. “Brown, Intramax: A Hierarchical Aggregation Procedure for the Functional Regionalisation of Interaction Data”. Department of Civic Design, University of Liverpool. Civic Design Software Note 1
4. Brown, P. J. B. 1988. “DENPLT: a Dendrogram Plotting Subroutine”. Department of Civic Design, University of Liverpool. Civic Design Software Note 2