· First Workshop on Peer-to-Peer Knowledge Management (P2PKM), in conjunction with Mobiquitous 04, Boston, Massachusetts, USA, August 22-25, 2004.

· Third International Conference on Modeling and Using Context (Context 01);

· Fourth International Conference on Modeling and Using Context (Context 03);

· Third International Conference on Knowledge Management (I-Know 03);

· Fourth International Conference on Knowledge Management (I-Know 04);

· Fifth International Conference on Knowledge Management (I-Know 05);

· First Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services (Mobiquitous 04);

· Second Workshop on Knowledge Management for Distributed Agile Processes: Models, Techniques, and Infrastructure (KMDAP2004);

· First Workshop on Peer-to-Peer Knowledge Management (P2PKM), Boston, August 22, 2004;

· Workshop on Peer-to-Peer and Agent Infrastructures for Knowledge Management WM2005) in conjunction with the 3rd Conference Professional Knowledge Management (Experiences and Visions, Kaiserslautern, Germany, April 11.-13, 2005).