[youtube]http://www.youtube.com/watch?v=Eg7Jt_Yzl1o&feature=watch_response[/youtube]
[youtube]http://www.youtube.com/watch?v=ViyIxrKJ4tE&feature=mfu_in_order&list=UL[/youtube]
[youtube]http://www.youtube.com/watch?v=XowvcrOl0DY&feature=related[/youtube]
[youtube]http://www.youtube.com/watch?v=vzprwVtPp9Q&feature=mfu_in_order&list=UL[/youtube]
[youtube]http://www.youtube.com/watch?v=NephEUelu3A&feature=related[/youtube]
RESEÑA BIBLIOGRAFICA- ANDRES LOPEZ