1. Biofuels for Transport an International Perspective, Chirat, Frances;IEA,2004
2. USDA Foreign Agricultural Service, Gain Report Number NL4025, EU Biofuels Annual 2014,http://gain.fas.usda.gov/Recent%20GAIN%20Publications/Biofuels%20Annual_The%20Hague_EU-28_7-3-2014.pdf (Accessed 29 October 2014).
3. Continuous flow transformations of glycerol to valuable products: an overview;Len;Sustain. Chem. Process.,2014
4. Glycerol as a renewable resource for wood adhesives;Maminski,2011
5. Value-added uses for crude glycerol–a byproduct of biodiesel production;Yang;Biotechnol. Biofuels,2012