1. BP Statistical Review of World Energy , http://www.bp/com/en/global/corporate/about-bp/energy-economics/statistical-review-of-world-energy-2013.html
2. S. Dumitriu , Polysaccharides: Structural Diversity and Functional Versatility, CRC Press, 2nd edn, 2012
3. H. Langeveld , J.Sanders and M.Meeusen, The Biobased Economy: Biofuels, Materials and Chemicals in the Post-oil Era, Earthscan, 2012
4. Quo vadis biofuels?
5. Catalytic conversion of biomass to biofuels