http://en.wikipedia.org/wiki/Luigi_Bianchi
http://www34.homepage.villanova.edu/robert.jantzen/bianchi/index.htm
http://genealogy.math.ndsu.nodak.edu/html/id.phtml?id=58047
_ Einstein's Special Theory of Relativity E=mc2 speed of light
http://www.youtube.com/watch?v=AZ6N85lNgHY
_ Buratti zecchino d'oro bmx
http://www.youtube.com/watch?v=cmOfZM-d2X8