1
文献名:principles of optimal location in a large homogeneous area 
作者:David A. Starrett 
期刊:Journal of Economic Theory, 1974, vol. 9, issue 4, pages 418-448 
电子链接:http://www.sciencedirect.com/science/article/B6WJ3-4CYG9KS-8S/2/c60958408c2b054fc2db14361256a56e
2
文献名:the optimal size of market areas 
作者:Belá Bollobás, Nicholas Stern 
期刊:Journal of Economic Theory,Volume 4, Issue 2, April 1972, Pages 154-173 
电子链接:http://www.sciencedirect.com/science/article/B6WJ3-4CYGBWD-NV/2/b8ea7cc201cd06089856fda97a955f8b
3
文献名:product heterogeneity and public policy 
作者:Chamberlin 
期刊:American. Economic Review, Papers and Proceedings, 1950,40,85-92 
电子链接:
4
文献名:Product Differentiation and Welfare 
作者:Spence, Michael 
期刊:American Economic Review. Volume  66 (1976),Issue 2 (May),Pages: 407-14
电子链接:http://www.jstor.org/pss/1817254
5
文献名:Product Differentiation and Welfare Economics 
作者:, by Alex Hunter 
期刊: 
电子链接:http://www.jstor.org/pss/1881993
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