1. U.S. Environmental Protection Agency ENERGY STAR Program, “Report to Congress on Server and Data Center Energy Efficiency Public Law 109–431,” August 2. 2007. page 7
2. Kaplan , James M.
Forrest , William and
Kindler , Noah . 2008. “Revolutionizing Data Center Energy Efficiency,” 10–13. McKinsey & Company. Julypages 3, 4
3. U.S. Department of Energy (DOE) and U.S. Environmental Protection Agency (EPA), “Fact Sheet on National Data Center Energy Efficiency Information Program,” March 19. 2008. page 2
4. The Green Grid, “Green Grid Metrics: Describing Data Center Power Efficiency Technical Committee White Paper,” February 20. 2007. page 2
5. Stanley , John . Uptime Institute, Corporate Average Datacenter Efficiency Program description,http://uptimeinstitute.org/content/view/273/250/