5. Picture Citation http://www.officialpsds.com/MC-Escher-PSD36435.html http://www.mcescher.com/Biography/biography.htm http://mathcentral.uregina.ca/beyond/articles/Art/Escher.html http://en.wikipedia.org/wiki/M._C._Escher http://en.wikipedia.org/wiki/Bridget_Riley http://magicanddreams.wordpress.com/2012/03/06/bridget-riley-versus-saturn/ http://blog.2modern.com/2010/07/bridget-riley-a-study-in-movement-and- color.html http://blog.2modern.com/2010/07/bridget-riley-a-study-in-movement-and- color.html http://www.masterworksfineart.com/inventory/vasarely/vasarely.php http://smokenmirrorsblog.wordpress.com/2009/10/07/vasarely-x-fendi/ http://harvestart.blogspot.com/2010/02/op-art.html http://en.wahooart.com/a55a04/w.nsf/Opra/BRUE-6WHLYC http://oddsnendspics.blogspot.com/2009/02/examples-of-kinetic-illusions-in-op- art.html http://oddsnendspics.blogspot.com/2009/02/examples-of-kinetic-illusions-in-op- art.html http://www.escapeintolife.com/essays/the-strange-worlds-of-m-c-escher/

6. Information citations Victor Vasarely, Leader of the Op Art Movement (function() { Var Po = Document.createElement('script'); Po.type = 'text/javascript'; Po.async = True; Po.src = 'https://apis.google.com/js/plusone.js'; Var S = Document.getElementsByTagName('script')[0]; S.parentNode.insertBefore(po, S); })();." Victor Vasarely, Leader of the Op Art Movement, Masterworks Fine Art. Masterworks Fine Art., 2012. Web. 23 Nov. 2012. http://www.masterworksfineart.com/inventory/vasarely/vasarely.php http://www.masterworksfineart.com/inventory/vasarely/vasarely.php Payne, Olly. "Bridget Riley | Op-art.co.uk." OpArtcouk RSS. N.p., 2012. Web. 23 Nov. 2012.. "Drawing Hands by Escher." Drawing Hands by Escher. N.p., 2012. Web. 23 Nov. 2012.. "The Official M.C. Escher Website." The Official M.C. Escher Website. The M.C. Escher Company B.V, 2012. Web. 23 Nov. 2012..