Proceedings of the 20th World Conference on Open Learning and Distance Education, \"The Future of Learning - Learning for the Future: Shaping the Transition\", ICDE2001, Düsseldorf, Germany, 01-05 April 2001 10 Bl.
Proceedings of the 2nd International Conference on the Practical Application of Intelligent Agents and Multi-Agent Technology, 1997 Blackpool, 1997 S. 271 - 285