Matthias Wester-Ebbinghaus Daniel Moldt Michael Köhler-Bußmeier From Multi-Agent to Multi-Organization Systems: Utilizing Middleware Approaches. 46-65 2008 ESAW http://dx.doi.org/10.1007/978-3-642-02562-4_3 conf/esaw/2008 db/conf/esaw/esaw2008.html#Wester-EbbinghausMK08