1. Eurostat (Ed.). (2010). Regional yearbook (2010). Accessed August 30, 2011, from http://epp.eurostat.ec.europa.eu/portal/page/portal/publications/regional_yearbook
2. Giddens, A. (1986). Constitution of society: Outline of theory of structuration. Berkeley, CA: University of California Press.
3. Habich, R., & Spellerberg, A. (2011). Regionale Lebensqualität. Appearing in: Statistisches Bundesamt, WZB (Hg.): Datenreport 2011. Wiesbaden: Statistisches Bundesamt.
4. Heidenreich, M., & Wunder, C. (2008). Patterns of regional inequality in the enlarged Europe. European Sociological Review, 24(1), 19–36.
5. Rhodes, M. (Ed.). (1995). The regions and the new Europe: Patterns in core and periphery development. Manchester: Manchester University Press.