1. Ashland, 2011. http://www.ashland.com/Ashland/Static/Documents/APM/PC-10065-NA_Envirez_Linecard%2001.27.10.pdf (accessed 11-06-15.).
2. Arkansas, 2010. Arkansas Soybean Promotion Board, Arkansas Soybean Board Applaud’s Ford’s Use of Soy-based Foam in vehicles. http://www.themiraclebean.com/news/aspb-applauds-ford%E2%80%99s-use-soy-based-foam-vehicles (accessed 15-08-14.).
3. Biodiesel Magazine, 2013. http://www.biodieselmagazine.com/articles/9221/ufop-samples-60-stations-finds-biodiesel-feedstock-diversity-up (accessed 30.11.15.).
4. BioGrace, 2011. Harmonised Calculations of Biofuel Greenhouse Gas Emissions in Europe. Version 4. www.biograce.net (accessed on 29.09.15.).
5. Raw material demand and sourcing options for the development of a bio-based chemical industry in Europe.: Part 1: estimation of maximum demand;Bos;Biofuel Bioprod. Biorefin.,2013