3Park, H. W., Hong, H. D., Leydesdorff, L.. A Comparison of the Knowldge-based Innovation Systems in the Economics of South Korea and the Netherlands Using Triple Helix Indicators [J] . Scien- tometrics, 2005:65 (1) : 3-27.
4Shin Jung Cheol.Lee Soo Jeung, Kim Yangson.. Knowledge- based innovation and collaboration: a triple-helix approach in Saudi Arabia [J] .Scientometrics, 2012:90 (1) : 311 -326.
5Zhao Star X. & Ye F Y.. Exploring the directed h-degree in directed weighted networks [J] . Journal of Informetrics, 2012:6 (4) : 619-630.
6David Croslin. Innovate the Future: A Radical New Approach to IT Innovation [M] . Prentice Hall, 2010.
7Thomas Wallner, Martin Menrad. Extending the Innovation Ecosystem Framework [R] .Upper Austria University of Applied Sci- ences, School of Business, 2010.
8VAT Rates Applied in the Member States of the European Union. European Commission Taxation and Customs Union, 2012- 01-01.