1. 2015 key world energy statistics. IEA – International Energy Agency. [accessed 05.01.16].
2. IPCC. Climate Change 2014: Synthesis Report. Contribution of working groups I, II and III to the fifth assessment report of the intergovernmental panel on climate change [Core Writing Team, Pachauri RK, Meyer LA, editors.]. IPCC, Geneva, Switzerland; 2014. 151 pp.
3. Energy Technology Perspective 2014 Harnessing Electricity’s Potential. IEA – International Energy Agency. [accessed 05.01.16].
4. Overview of current development in electrical energy storage technologies and the application potential in power system operation;Luo;Appl Energy,2015
5. Progress in electrical energy storage system: a critical review;Chen;Prog Nat Sci,2009