1. Lee B, Gushee D. Massive electricity storage, An AIChE Paper; June 2008.
2. KEMA summary of ESA storage jobs report;KEMA, Inc.,2010
3. Techno-economic comparison of energy storage systems for island autonomous electrical networks;Kaldellis;Renewable and Sustainable Energy Reviews,2009
4. An alternative to batteries for uninterruptible power supply systems;DOE, US, Flywheel Energy Storage,2009
5. Flywheels;Hull;Encyclopedia Energy,2004