1. InIT Cloud Computing Lab; ZHAW Zurich University of Applied Sciences; Technikumstrasse 9 WInterthur Switzerland
2. Department of Information Engineering (DINFO); University of Firenze; Via di S.Marta 3, I-50139 Firenze Italy
3. Department of Information Engineering and Computer Science (DISI); University of Trento; Via Sommarive 5, I-38123 Trento Italy
4. TILab; Telecom Italia; Via di Val Cannuta 250, I-00166 Rome Italy