6LEYDESDORFF LOET. The challenge of scientometrics: the development, measurement, and self-organization of scientific communication[M]. Leiden: DSWO Press, I.eiden University, 1995 : 111-121.
7LEYDESDORFF LOET. The measurement and evaluation of triple helix relation among university, industries, and governments[C]. Paper to be presented at the Fourth Inter- national Triple Helix Conference, Copenhagen, 2002.
