1. Malone, C., Belady, C.: Metrics to Characterize Data Center & IT Equipment Energy Use. In: Proceedings of 2006 Digital Power Forum, Richardson, TX (2006)
2. Uptime Institute, Uptime Institute 2007 Data Center Industry Survey (2007),
http://www.uptimeinstitute.com
3. The Green Grid, White Paper #6 “Green Grid Data Center Power Effieicny Metrics: PUE and DCiE (December 2008),
http://www.thegreengrid.org/~/media/WhitePapers/White_Paper_6_-_PUE_and_DCiE_Eff_Metrics_30_December_2008.pdf?lang=en
4. The Green Grid, White Paper #49-PUE: A Comprehensive Examination of the Metric (October 2, 2012),
http://www.thegreengrid.org/en/Global/Content/white-papers/WP49-PUEAComprehensiveExaminationoftheMetric
5. EPA, DOE, TGG, ASHRAE, et.al. Recommendations for Measuring and Reporting Over-all Data Center Efficiency, (May 17, 2011), EPA Website:
http://www.energystar.gov/ia/partners/prod_development/downloads/Data_Center_Metrics_Task_Force_Recommendations_V2.pdf?7438-21e8