Vídeos de referência para aula 4:
http://www.youtube.com/watch?v=jCRiIwmoJ4E&feature=player_embedded#!
http://www.youtube.com/watch?v=UdU_g13L3zc&feature=related
Teclopolis (Javier Mrad e Diego Primero, 2010)
http://www.youtube.com/watch?v=m4YPDh8_Myw&feature=player_embedded#!
