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2. What are new towns for?;Alonso;Urban Studies,1970
3. Brief 2: The Role of Commuting in Overall Travel, Commuting In America 2013: The National Report on Commuting Patterns and Trends;American Association of State Highway and Transportation Officials (AASHTO),2013
4. Urban spatial structure;Anas;Journal of Economic Literature,1998
5. Planet of cities;Angel,2012