1MARSHALL,A.Principles of Economics[M].London: Macmillan,1890.
2WEBER,A.The theory of The Location of Industries (1909)[M].The University of Chicago Press,Chicago & London,1965.
3Krugman , P . Geography and Trade[M]. MIT Press,1991.
4Friedman M. & Florida R. The Geographic Sources of Innovation:Technological Infrastructure and Product Innovation in the UnitedStates[J]. Annals of American Geographer,1994.
10C. A. L. Hilber, and I. Voicu, Agglomeration Economies and the Location of Foreign Direct Investment: Empirical Evidence from Romania. MPRA Paper, 2007.