1. Beauregard, R. (2004) The resilience of U.S. cities: decline and resurgence in the late 20th century’ paper presented at Symposium on The Resurgent City, LSE. http://www.lse.ac.uk/collections/ResurgentCity/Papers/htm.
2. Economic and social change in urban Britain and the inner cities;Begg,1986
3. Urban Europe: A Study of Growth and Decline;Van den Berg,1982
4. Brinkoff, T (2006) City Population, http://www.citypopulation.de.
5. The People: Where Will They Work?,1999