http://en.wikipedia.org/wiki/Charles_Peirce
http://www.peirce.org/
http://www.iep.utm.edu/p/PeirceBi.htm
_ Creative Quotations from Charles Sanders Peirce for Sep 10
http://jp.youtube.com/watch?v=YeZFS1RJQbE
_ Semi-Otica
http://jp.youtube.com/watch?v=PzXyqMUHpoU