The Oil Drum (11/07/2011): http://www.theoildrum.com/node/8120.

Lecturas para una civilización más allá del Peak Oil
The Oil Drum (11/07/2011): http://www.theoildrum.com/node/8120.
The Oil Drum (13/04/2007). URL: http://www.theoildrum.com/node/2446
The Oil Drum (06/06/2007): http://www.theoildrum.com/node/2598
The Oil Drum (30/09/2009): http://campfire.theoildrum.com/node/5825
The Oil Drum (05/11/2008): http://www.theoildrum.com/node/4727