1. Renewables 2013. Global status report;REN21,2013
2. UNEP/BNEF. Global trends in renewable energy investment 2012. Frankfurt: Frankfurt School-UNEP Collaborating Centre for Climate & Sustainable Energy Finance, Bloomberg New Energy Finance (BNEF); 2012.
3. Re-considering the economics of photovoltaic power;Bazilian;Renew Energy,2013
4. Global overview on grid-parity;Breyer;Prog Photovoltaic Res Appl,2013
5. IEA. Renewable energy medium-term market report 2012 market trends and projections to 2017. Paris: Organisation for Economic Co-operation and Development/International Energy Agency (IEA); 2012.