http://www.biodieselspain.com/2006/07/03/general-motors-chrysler-y-ford-duplicaran-la-produccion-de-vehiculos-que-utilizan-combustibles-alternativos/ Biocarburantes, Biodiesel y Bioetanol Sat, 11 Oct 2008 12:57:26 +0000 http://wordpress.org/?v=2.0.2