Sources

Ron Knott's web pages on Mathematics. January 30, 2008. University of Surrey. April 17, 2008 <htttp:www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibBio.html //>> Maths to Play. May 28, 2007. EDU.fi. April 17, 2008 //    <span class="wiki_link_ext">//<//<span class="wiki_link_ext">htttp //<span class="wiki_link_ext">: //www2.edu.fi/magazinefactory/magazines/mathstoplay/index.php?str=40&artID=85 > <span class="wiki_link_ext"><span class="wiki_link_ext"><span class="wiki_link_ext"><span class="wiki_link_ext"><span class="wiki_link_ext"><span class="wiki_link_ext"><span class="wiki_link_ext"><span class="wiki_link_ext"> Gies, Joseph, and Frances. __Leonard of Pisa and the New Mathematics of the Middle Ages__. New York: Thomas Y. Crowell Company, 1969.