1. Trade and circuses: explaining urban giants;Ades;Quarterly Journal of Economics,1995
2. The spatial economy, cities, regions and international trade;Anas;Regional Science and Urban Economics,2001
3. Das Gesetz der Bevölkerungskonzentration;Auerbach;Petermanns Geographische Mitteilungen,1913
4. Zipf distribution of U.S. firm sizes;Axtell;Science,2001
5. Emergent cities: A microeconomic explanation of Zipf's law;Axtell,2001