1. Energy supply, its demand and security issues for developed and emerging economies;Asif;Renewable and Sustainable Energy Reviews,2007
2. BGR, 2007. Reserves, resources and availability of energy resources 2005. In: Federal Institute for Geosciences and Natural Resources, H. (Ed.), Bundesanstalt für Geowissenschaften und Rohstoffe.
3. BP Statistical Review of World Energy 2006;BP,2006
4. BP Annual Review 2007;BP,2007
5. BP Statistical Review of World Energy 2007;BP,2007