1. Martin, M., Eklund, M.: Improving the environmental performance of biofuels with industrial symbiosis. Biomass Bioenergy 35, 1747–1755 (2011)
2. Dasari, M.A., Kiatsimkul, P.P., Sutterlin, W.R., Suppes, G.J.: Low-pressure hydrogenolysis of glycerol to propylene glycol. Appl. Catal. A Gen. 281(1–2), 225–231 (2005)
3. European Biodiesel Board, Biodiesel Production Statistics. < http://www.ebb.eu.org/stats.php >. Accessed 15 Dec 2014
4. Pagliaro, M., Rossi, M.: The Future of Glycerol, Green Chemistry Series, 2nd edn. RSC Publishing, Cambridge (2010)
5. Schröder, A., Südekum, K.H.: Glycerol as a by-product of biodiesel production in diets for ruminants. In: Proceedings of the 10th international rapeseed conference. The regional institute, Ltd (1999)