A Market-Based Recommender System. - Luc Moreau 001; Norliza Zaini; Jing Zhou 004; Nicholas R. Jennings; Yan Zheng Wei; Wendy Hall 001; David De Roure; Ian Gilchrist; Mark O'Dell; Siegfried Reich; Tobias Berka; Claudia Di Napoli (AOIS@AAMAS, 2002)