7[1]Henry G. Overman,Stephen Redding, and Anthony J. Venables. The Economic Geography of Trade, Production and Income: A Survey of Empirics[R]. NBER, Working Paper, 2001.
8[2]Anthony J. Venables. Cities and Trade: External Trade and Internal Geography in Developing Economies [J]. NBER,Working Paper, 2000.
9[3]J. Vernon Henderson, Zmarak Shalizi, and Anthony J. Venables. Geography and Development [R]. NBER, Working Paper, 2001.
10[4]Bent Dalurm, The Formation of Knowledge-based Clusters in North Jutland and Western Sweden[R]. Working Paper to the DRUID Conference on National Innovation Systems, 1999.
