1. Clarson SJ (2009) Some reflections on the element silicon. Silicon 1:1–2. doi: 10.1007/s12633-009-9006-2
2. Brain M How Semiconductors Work. HowStuffWorks.com, date published: April 25,2001, date accessed: November 8, 2014
3. Bresiger G Will New York City Become The New Silicon Valley? NYpost.com, date published: August 16, 2014, date accessed: November 7, 2014, http://nypost.com/2014/08/16/will-new-york-city-become-the-new-silicon-valley/
4. Stewart D Silicon. Chemicool.com, date published: October 9, 2012, date accessed: December 9, 2014, http://www.chemicool.com/elements/silicon.html
5. KEMI Swedish Chemicals Agency, Silicon dioxide. Apps.kemi.se, year published: 2006, date accessed: December 9, 2014, http://apps.kemi.se/flodessok/floden/kemamne_eng/kiseldioxid_eng.htm