1. Chan, T.W. (1998), The past, present, and future of educational agents http://www.apc.src.ncu.edu.tw/apc/ppt_chan.html
2. Collis, B. and Moonen, J. (2000), Flexible Learning in a Digital World, London, Kogan Page.
3. Croft, D. W.: Intelligent Software Agents: Definitions and Applications. http://www.alumni.caltech.edu/~croft.
4. De Diana, I., Aroyo, L.: Knowledge Management for Networked Learning Environments: Applying Intelligent Agents. [On-line] (Accessed November 2004) http://projects.edte.utwente.nl/proo/italo.htm.
5. Finnie S.: Information Retrieval for Your Intranet, PC Magazine Online http://www8.zdnet.com/pcmag/issues/1609/pcmg0041.htm.