3Cristina Bernini. 2009. Convention Industry and destination clusters: Evidence from Italy [J].Tourism Management. (1).
4Innovative Hot Spots in Europe: policies to promote trans-border clusters of creative activity. Trend Chart Policy Workshop, Background Paper on Methods for Cluster Analysis. May -6, 2003(online).
5Porter, M. E. 1990 The Competitiveness Advantage of Nations. New York: Free Press.
6Thematic Report: Cluster Policies, European Trend Chart on Innovation, Covering Period up to March2003 .http//trendchart.cordis.lu/reports/ docu ments/tr_clustcrs_03_ 1 .pdf(online). Luxembourg.