2M. E. Porter, On Competition, Boston.. Harvard Business School Press, 1998.
3P. Knorringa, "Agra.. An Old Cluster Facing the New Competition," World Development, Vol. 27, No. 9 (1999) ,pp. 1587 - 1604.
4R. Rabellotti & H. Schmitz, "The Internal Heterogeneity of Industrial Districts in Italy,Brazil and Mexico," Regional Studies, Vol. 33, No. 2 ( 1999), pp. 97 - 108.
5H. Schmitz, "Global Competition and Local Cooperation: Success and Failure in the Sinos Valley, Brazil," World Development ,Vol. 27 ,No. 9(1999) ,pp. 1627 - 1650.
6P.C. Schmitter & W. Streeck, The Organization of Business Interests : Studying the Associative Action of Business in Advanced Industrial Societies, Koln: Max-Planck-Institut for Gesellschaftsforschung,1999.
7R. F. Doner & B. Schneider, "Business Association and Economic Development: Why Some Associations Contribute More than Others ," Business & Politics, Vol. 2, No. 3 (2000), pp. 261 - 288.