2[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.
3[2]Anthony J. Venables. Cities and Trade: External Trade and Internal Geography in Developing Economies [J]. NBER,Working Paper, 2000.
4[3]J. Vernon Henderson, Zmarak Shalizi, and Anthony J. Venables. Geography and Development [R]. NBER, Working Paper, 2001.
5[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.
6[5]Danny Quah. Demand-driven Knowledeg Cluster in a Weightless Economy[R]. Working Paper, 2001.
7[6]Catherine Beaudry and Peter Swann. Growth in Industrial Cluster: a Bird's Eye View of the United Kingdom[R]. SIEPR Dicussion Paper. 2001, No 00- 38.