1. EECS - TCS, KTH Royal Institute of Technology, Stockholm, Stockholm, Sweden, 10044 (e-mail: longz@kth.se)
2. R&D, Tellu, Oslo, Oslo, Norway, (e-mail: brice.morin@sintef.no)
3. EECS - SCS, KTH Royal Institute of Technology, Stockholm, Stockholm, Sweden, (e-mail: baudry@kth.se)
4. EECS - TCS, KTH Royal Institute of Technology, Stockholm, Stockholm, Sweden, 10044 (e-mail: martin.monperrus@csc.kth.se)