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http://www.nist.gov/itl/cloud/upload/RATAX-CloudServiceMetricsDescription-DRAFT-20141111.pdf
. Accessed 17 June 2015
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https://aws.amazon.com/
. Accessed 28 Feb 2018
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. Accessed 28 Feb 2018
4. Microsoft Azure (2018).
https://azure.microsoft.com
. Accessed 28 Feb 2018
5. Lecture Notes in Computer Science;N Alhebaishi,2017