Virent Energy and Shell see success producing gasoline Biomass Magazine, April 7, 2008
Plants Converted Directly Into Biogasoline, Not Ethanol Environmental News Service, March 27, 2008
Shell, Virent Energy Systems form 5-year partnership to make biogasoline; demo plant in 2010; increases momentum of biocrude, biogasoline trend Biofuels Digest, March 27, 2008
Shell, Virent Seek to Produce Gasoline From Sugar Bloomberg.com, March 26, 2008
Shell hopes for sweet smell of success Financial Times, March 26, 2008
Shell, Virent in joint venture to convert crops to biogasoline International Herald Tribune, March 26, 2008
Funds aid sugar plans Virent raises $21 million to develop 'green gasoline' September 5, 2007
Shell subsidiary plans to manufacture hydrogen in Houston Houston Business Journal, May, 24 2007
Support local biofuel research (A Letter to The Editor) Wisconsin State Journal, April 27, 2007
"Keen on clean: Letting hydrogen flow" Milwaukee Journal Sentinel, July 06, 2004