2Sherman C, Price G. The Invisible Web: Uncovering Information Sources Search Engines Can't Reach. New York: CyberAge Books, 2001.
3Smith C B. Getting to Know the Invisible Web (Deep Web Searching). School Library Journal, 1 July 2001.
4O'Leary M. Invisibie Web Discovers Hidden Treasures. Information Today, 2000, 17 (1): 16-18.
5Dahn M. Spotlight on the Invisible Web. Online, 1 July 2000.
6Noack D.Web Sites Hidden from View.Link-Up, 1 September 2001.
7Wiseman K. The Invisible Web—Searching the Hidden Part of the Web. http: //www3. dist214. k12. il. us/invisible/article/invisibleartiele. html.
8Clyde A. The Invisible Web. InfoTech, 2002, 29 (4).
9Sherman C. New Web Map Reveals Previously Unseen Bow Tie Organizational Structure. Information Today, 22 May 2000. http: /!www. infotoday. com/newsbreaks/nb000522-1. html.
10Monopoli M, Nicholas D. A User-centred Approach to the Evaluation of Subject Based Information Gateways: Case Study SOSIG. Aslib Proceedings, 2000, 52 (6).