5Vaquero L M, Rodero-Merino, Caceres J, et al. A break in the clouds: towards a cloud definition[J]. ACM SIOCOMM Computer Communication Review, 2009, 39(1): 50-55.
7Foster I, Zhan Y, Raicu I, et al. Cloud computing and grid computing 360-degree compared[C]//Proceedings of Grid ComputingEnvironments Workshop. Austin, TX, USA: GCE, 2008: 1-10.
8Geelan J. Twenty one experts define cloud computing, virtualization [J/OL]. [2012-03-02]. http://virtualization,sys-con.com/node/612375.
9Rittinghouse J W, Ransome J F. Cloud computing., implementation, management, and security[M]. Boca Raton, FL, USA: CRC Press, 2010.
