7Novas Jesper:Building sustainable competitive advantage from knowledge in the reginn:The industrial enzymes industry, European Planning Studies,2006(6) :681 - 696.
8David. B. Audretsch: Industrial policy and competitive advantage, Edward Elgar Publishing,2008(3).
9Glenn W. Milligan:A validation study of a variable weighting algorithm for cluster analysis, Journal of Classification, 1998 (12) :53 - 71.
10Richard A Johnson;Dean W Wiehern.实用多元统计分析.清华大学出版社,2001(4):221-338.