OUVIR E INTERVIR - O TIMBRE DA CDU

http://www.youtube.com/user/CDUGUARDA2009#play/favorites/0/EXq7DSsKRDE

http://www.lusa.pt/info/lusa/ea2009/ea2009.html

http://www.cienciahoje.pt/index.php?oid=35538&op=all#cont

http://www.novaguarda.pt/noticia.asp?idEdicao=200&id=13780&idSeccao=2817&Action=noticia