1. The NIST Definition of Cloud Computing (Draft);Mell;NIST.,2011
2. Cloud Computing – The complete cornerstone guide to cloud computing best practices.pp-18.
3. Rajkumar Buyya , Chee Shin Yeo , Srikumar Venugopal, James Broberg , Ivona Brandic, Cloud computing and emerging IT platforms: Vision, hype, and reality for delivering computing as the 5th utility, Future Generation Computer Systems, Elsevier,2008.
4. Jeremy Geelan. Twenty one experts define cloud computing. virtualization, August 2008. Electronic Magazine, article available at http://virtualization.sys con.com/node/612375.
5. A Break in the Clouds: Towards a Cloud Definition. ACM SIGCOMM;Vaquero;Computer Communication Review.,2008