Mariana Queiroz Barboza (21 September 2007). "A mamata da energia terminou" (in Portuguese). InstoÉ independente. Archived from the original on 13 December 2014. Retrieved 23 January 2015.
Mariana Queiroz Barboza (21 September 2007). "A mamata da energia terminou" (in Portuguese). InstoÉ independente. Archived from the original on 13 December 2014. Retrieved 23 January 2015.