White papers on cloud computing

Which is the best white papers on cloud computing? I am doing a project on cloud, please share with me some white papers. thanks

The best whitepaper on internet with a proper definition of "Cloud Computing" can be found at NIST.gov website. Best whitepaper on Cloud Computing

Source and Copyrights : NIST

Different sources would say different definitions, understand the fundamentals concept of cloud computing. I would highly recommend you to refer to the image on this post, which explains clearly what is cloud computing all about!