4Erica Schoenberger, Competition:Time and Space in Industrial Change,in Gary Gereffi and Miguel Korzeniewicz(ed), Commodity Chains and Global capitalism, Greenwood Press,1994.
5Claus Steinele and Holger Schiele:When Do Industries Cluster?——A Proposal on How to Assess an Industry's Propensity to Concentrate at a Single Region or Nation, Research Policy 31,2002.
6UNIDO:Development of Clusters and Networks of SMEs,The UNIDO Programme, 2001.
