4.中国互联网络发展状况统计报告(2002年7月).Available at http://www.cnnic.net.cn/develst/2002—7/index.,shtm1Nov,6th,2002.
5Lawrence, S. , Giles, C. L.. Accessibility of information on the web. Nature, 1999,400:107 - 109.
6Mike Thelwall. A publicly accessible database of UK university website links and a discussion of the need for human intervention in web crawling. Available at http ://cybermetrics. wlv. ac.uk/database/Nov, 1^st, 2002.
7Snyder, H. W. , Rosenbaum, H.. Can search engines be used as tools for Web-link analysis.? : Acritical review. Journal of Documentation, 1999,55 : 375 - 384.
8Alison Holmes, Charles Oppenheim. Use of citation analysis to predict the outcome of the 2001 Research Assessment Exercise for Unit of Assessment (UoA)61 :Library and Information Management. Available at http://informationr. net/Jr/6- 2/paper103a. html, Nov. 1st, 2002.
9Ingwersen, P. The calculation of Web impact factors. Journal of Documentation, 1998,54 : 236 - 243.
10Thelwall, M. Extracting macroscopic information from Web links.Journal of the American Society for Information Science and Technology,2001,52(13) : 1157 - 68.