1. Fraunhofer Institute for Open Communication Systems Cloud Concepts for the Public Sector in Germany-Use Cases
2. NIST SP 500-292 NIST Cloud Computing Reference Architecture
3. ESG White Paper, Cloud Computing: Networking and WAN Optimization
4. Gartner Says Worldwide Cloud Services Market to Surpass $109 Billion in 2012 2012 http://www.gartner.com/newsroom/id/2163616
5. Gartner Says Worldwide Public Cloud Services Market to Total $131 Billion 2013 http://www.gartner.com/newsroom/id/2352816