1. http://www.nytimes.com/2011/09/09/technology/google-details-and-defends-its-use-of-electricity.html?_r=0.
2. http://www.environmentalleader.com/2011/09/09/google-reveals-electricity-use-breaking-its-silence/#ixzz44QcPm736.
3. http://www.computerworld.com/article/2598562/data-center/data-centers-are-the-new-polluters.html.
4. http://searchstorage.techtarget.com/definition/DRAM.
5. https://global.britannica.com/technology/static-random-access-memory.