1. GENI, http://www.geni.net
2. FIRE, http://cordis.europa.eu/fp7/ict/fire/
3. AKARI, http://akari-project.nict.go.jp/eng/conceptdesign.htm
4. CNGI, http://www.cernet2.edu.cn/en/bg.htm
5. Albrecht, J., Tuttle, C., Snoeren, A.C., Vahdat, A.: Loose Synchronization for Large- Scale Networked Systems. In: Proceedings of the USENIX Annual Technical Conference (USENIX), pp. 301–314 (2006)