1. Energy Storage on the Grid. Pike Research Report; 2010.
2. Energy Storage Program Planning Document. In: US Department of Energy, Office of Electricity Delivery & Energy Reliability; 2011.
3. Meeting the Energy Challenge, A White Paper on Energy. In: Department of Trade and Industry, London; 2007.
4. Electricity Storage: Parliamentary office of Science and technology Report, London; 2008. p. 1–4.
5. The Future of Energy Storage Technologies and Policy. In: Royal Academy of Engineering (London) and Chinese Academy of Sciences (Beijing); 2012.