Cooperative Information Agents VI 6th International Workshop, CIA 2002, Madrid, Spain, September 18 - 20, 2002. Proceedings - Klusch, Matthias; Klusch, Matthias; Ossowski, Sascha; Ossowski, Sascha; Shehory, Onn; Shehory, Onn (Springer Berlin Heidelberg : Imprint: Springer, 2002)