- AISB Journal Special Issue on Agent Technology 1(1):21--40 (2001)
- University of Aberdeen, University Of Aberdeen, (January 2004)
- Proceedings of the AISB'01 Symposium on Information Agents for Electronic Commerce, page 61--69. University of York, The Society for the Study of Artificial Intelligence and the Simulation of Behaviour, (March 2001)


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