per chi si fosse perso la conferenza
http://www.youtube.com/watch?v=mUDN-ifyStE&playnext=1&list=PLCA0DF2DF7EFB35E9&feature=results_main
http://www.youtube.com/watch?v=h_UXx6zKf9E
http://www.youtube.com/watch?v=YwwkeJMZdSw
http://www.youtube.com/watch?v=xM5x4vDoMbo
http://www.youtube.com/watch?v=XzsuwcheOis
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