1. European Commission. Energy for the future: renewable sources of energy, COM (97)599 (Final). Brussels: European Commission; 1997.
2. US National Biodiesel Board, US Biodiesel Production Capacity; 2008.
3. Pachauri N, He B. Value-added utilization of crude glycerol from biodiesel production: a survey of current research activities. In: An American society of agricultural and biological engineers (ASABE) meeting presentation. Portland, Oregon; 2006. p. 16.
4. Low-pressure hydrogenolysis of glycerol to propylene glycol;Dasari;Appl Catal A: Gen,2005
5. Czernik S, French R, Feik C, Chornet C. Production of hydrogen from biomass-derived liquids. In: Proceedings of the 2000 DOE hydrogen program review. USA; 2000.