1. The Climate Group, SMART 2020: Enabling the low carbon economy in the information age. Technical report; 2008. 〈http://www.smart2020.org/assets/files/02_Smart2020Report.pdf〉.
2. Energy Information Administration. Use of Energy in the United States Explained; 2012. 〈http://www.eia.gov/energyexplained/〉.
3. Kazandjieva MA, Heller B, Gnawali O, Levis P, Kozyrakis C. Green enterprise computing data: assumptions and realities. In: Proceedings of the international green computing conference (IGCC). San Jose, CA, USA: IEEE Computer Society; 2012. p. 1–10.
4. After-hours power status of office equipment in the USA;Webber;Energy,2006
5. Kazandjieva M, Heller B, Gnawali O, Hofer W, Kozyrakis P. Software or hardware: the future of green enterprise computing. Technical report No. CSTR 2011-02. Stanford University; 2011.