1. A Wiles, interview on PBS (2000), http://www.pbs.org/wgbh/nova/physics/andrew-wiles-fermat.html
2. http://events.inf.ed.ac.uk/sicsa-mcp/
3. OEIS Foundation Inc., The On-Line Encyclopedia of Integer Sequences (2011), http://oeis.org
4. www.innocentive.com (retrieved October 2012)
5. SOCIAM: the theory and practice of social machines, http://tinyurl.com/cmmwbcf