1. Alò, M. D., di Consiglio, L., Falorsi, S., Pratesi, M., Ranalli, M. G., Salvati, N. & Solari, F. (2007). Small area models for unemployment rate estimation at sub-provincial areas in Italy [online]. Retrieved June 20, 2010, from http://epp.eurostat.ec.europa.eu/portal/page/portal/research_methodology/documents/S1P3_SMALL_AREA_MODELS_FOR_UNEMPLOYMENT_DALO.pdf.
2. Arrufat, J. L., Díaz Cafferata, A. M. & Figueras, A. J. (1998). Unit-roots in spatial unemployment in Argentina. Testing in the presence of structural breaks. Mendoza: Asociación Argentina de Economía Política.
3. Bhorat, H. & van der Westhuizen, C. (2009). Poverty, inequality and the nature of economic growth in South Africa [online]. Retrieved October 8, 2009, from http://www.commerce.uct.ac.za/economics/seminars/.
4. Brakman, S., Garretsen, H. & Van Marrewijk, C. (2003). An introduction to geographical economics. Cambridge: Cambridge University Press.
5. Coombes, M. (1995). Dealing with census geography: Principles, practices and possibilities. In S.Openshaw (Ed.), Census user's handbook. Cambridge: GeoInformation International.