1. Ball, S. J., Bowe, R., & Gewirtz, S. (1994). Market forces and parental choice: Self-interest and competitive advantage. In S. Tomlinson (Ed.), Educational reform and its consequences. London: IPPR/Rivers Oram Press.
2. Quantitative methods in the real world: A consultant's view of practice;Beaumont;Environment and Planning A,1987
3. Birkin, M., Clarke, G. P., Clarke, M., & Wilson, A. G. (1996). Intelligent GIS: Location decisions and strategic planning. Cambridge, U.K.: Geoinformation.
4. Birkin, M., & Wilson, A. G. (1985). Some properties of spatial–structural–economic–dynamic models (Working Paper 440). Leeds, U.K.: School of Geography, University of Leeds.
5. Industrial location theory 2: Weber, Polander, Hotelling and extensions within a new framework;Birkin;Environment and Planning A,1986