1. Kimball, R.: The Data Warehouse toolkit. John Wiley & Sons, Chichester (2002)
2. Codd, E.F., Codd, S.B., Salley, C.T.: Providing OLAP to user-analysts: An IT mandate. Technical Report, E.F. Codd & Associates (1993)
3. Baeza-Yates, R., Ribeiro-Neto, B.: Modern Information Retrieval. Addison-Wesley, Reading (1999)
4. World Wide Web Consortium, http://www.w3.org
5. Xyleme, L.: A dynamic warehouse for XML data of the Web. IEEE Data Engineering Bulletin 24(2), 40–47 (2001)