1. Kates, W., Oil giants filling up on troubled ethanol plants. Associated Press, The Seattle Times, June 19, 2009.
2. Christiansen, R. C., French financiers acquire Panda Ethanol on credit bid. Biomass magazine May 2009.
3. Anonimous. Oil companies shop for discounted ethanol plants. Associated Press, June 18, 2009.
4. Gelsi, S., Valero to buy VeraSun plants for $ 477 million. Bankrupt ethanol maker draws $ 993 million in bids for 17 plants. Market Watch, March 18, 2009.
5. LaMonica, M., Biofuels firms Diversa, Celunol merge. Cnet news, February 12, 2007.