1. A case-based approach to knowledge navigation;Hammond,1996
2. Applying Case-based Reasoning: Techniques for Enterprise Systems;Watson,1997
3. World Wide Web Consortium, 1997. Extensible Markup Language 1.0, Recommendation by W3C:W3C.
4. World Wide Web Consortium home page: World wide web consortium page.
5. Textual case-based reasoning system using XML on the world-wide web;Shimazu,1998