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http://www.cisco.com/c/en/us/solutions/collateral/service-provider/global-cloud-index-gci/CloudIndexWhitePaper.html
. Accessed 7 Apr 2019
2. United States data center energy usage report.
https://eta.lbl.gov/sites/all/files/publications/lbnl-1005775_v2.pdf
. Accessed 7 Apr 2019
3. America’s data centers consuming and wasting growing amounts of energy.
http://www.nrdc.org/energy/data-center-efficiency-assessment
. Accessed 7 Apr 2019
4. Data Centre Energy Efficiency Benchmarking - E2 Singapore.
http://www.e2singapore.gov.sg/DATA/0/docs/Resources/NEADCEnergyBenchmarkingSummary-FinalReport.pdf
. Accessed 7 Apr 2019
5. Farrell, A., Hoffmann, H.: {MEANTIME}: achieving both minimal energy and timeliness with approximate computing. In: 2016 USENIX Annual Technical Conference (ACT), vol. 16, pp. 421–435. USENIX (2016)