1. IEA, “International Energy Outlook 2013,” Washington D.C.(25 July 2013).
2. When will fossil fuel reserves be diminished?;Shahriar Shafiee;Energy Policy,2009
3. Directive 2009/28/EC on the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC, E.P. a. o. t. C. o. A. 2009, (2009).
4. A review on global solar energy policy;Solangi;Renewable and Sustainable Energy Reviews,2011