Agent-Based Technologies and Applications for Enterprise Interoperability [electronic resource] : International Workshops, ATOP 2005 Utrecht, The Netherlands, July 25-26, 2005, and ATOP 2008, Estoril, Portugal, May 12-13, 2008, Revised Selected Papers / edited by Klaus Fischer, Jörg P. Müller, James Odell, Arne Jørgen Berre.