http://es.wikipedia.org/wiki/Luis_Alberto_Spinetta
http://www.youtube.com/watch?v=lMRRK5K5TwI
http://www.youtube.com/watch?v=yIWbdWXKF3o&feature=related
http://www.youtube.com/watch?v=DcoM2b9Npc0&feature=related
http://www.youtube.com/watch?v=8uvM_a8vNYY
http://www.youtube.com/watch?v=HexUl0tSOU4
http://www.youtube.com/watch?v=eUvgsDLOsKg&feature=related