1. IPCC guidelines for national greenhouse gas inventories;IPCC,2006
2. Environmental and ecological dimensions of biofuels;Goldemberg,2008
3. Nature outlook-Biofuels;Grayson;Nature,2011
4. BPSR, (2008). http://www.ief.org/whatsnew/Pages/BPStatisticalReview.aspx.
5. BPSR, (2017) (https://www.bp.com/content/dam/bp/en/corporate/pdf/energy-economics/statistical-review-2017/bp-statistical-review-of-world-energy-2017-full-report.pdf.