Agent Systems, Mobile Agents, and Applications Second International Symposium on Agent Systems and Applications and Fourth International Symposium on Mobile Agents, ASA/MA 2000 Zurich, Switzerland, September 13-15, 2000 Proceedings - Kotz, David; Kotz, David; Mattern, Friedemann; Mattern, Friedemann (Springer Berlin Heidelberg : Imprint: Springer, 2000)