1. AgentLink, ESPRIT network of excellence for agent-based computing, http://www.agentlink.org; see also: AgentLink's special interest group on intelligent information agents, http://www.dfki.de/∼klusch/i2a-SIG.html
2. S. Albayrak (Ed.), Intelligent Agents for Telecommunications, IOS Press, 1998
3. E. André (Ed.), Animated Interface Agents (special double issue), Applied Artificial Intelligence Journal 13(4/5) (1999)
4. WebPersona: a life-like presentation agent for the World-Wide Web;André;Knowledge-based Systems,1998
5. Y. Arens, C.A. Knoblock, C. Hsu, Query processing in the SIMS information mediator, in: A. Tate (Ed.), Advanced Planning Technology, AAAI Press, 1996