1. P. Thibodeau, “Data centers use 2 % of U.S. energy, below forecast,” 2011. [Online]. Available:
http://blogs.computerworld.com/18738/data_centers_use_2_of_u_s_energy_below_forecast
.
2. IDC, “Annual it spending by Western European utilities to reach 12.7 billion by 2017, says IDC energy insights,” 2013. [Online]. Available:
http://www.idc-ei.com/getdoc.jsp?containerId=prUS24251013
.
3. M. Baile, “The economics of virtualization: Moving toward an application-based cost mode,” 2009. [Online]. Available:
http://www.vmware.com/files/pdf/Virtualization-application-based-cost-model-WP-EN.pdf
.
4. J. He, “Datacenter power management: Power consumption trend,” 2008. [Online]. Available:
http://communities.intel.com/community/datastack/blog/2008/02/20/datacenter-power-management-power-consumption-trend
.
5. Statista, “Number of monthly active Facebook users worldwide from 3rd quarter 2008 to 2nd quarter 2013 (in millions),” 2013. [Online]. Available:
http://www.statista.com/statistics/264810/number-of-monthly-active-facebook-users-worldwide/
.