3George Stonehouse, Brian Snowdon. Competitive advantage revisited: Michael Porter on strategy and competitiveness [J]. Journal of Management Inquiry, 2007 (16): 256- 273.
4OECD.Compendium of Patent Statistics[]..2008
5Johnstone,,N.I.Hascic,D.Popp.Renewable Energy Policies and Technological Innovation:Evidence based on Patent Counts[].NBER Working Papers.2008
6U.S.International Trade Commission.Medical devices and equipment-competitive conditions affecting u.s.trade in Japan and other principal foreign markets[].USITC Publication.2007
7Dernis,H.,Guellec,D.,van,Pottelsberghe de la Potterie,B.Using patent counts for crosscountry comparisons of technology output[].STI Review.2001