1. The Electricity Advisory Committee, Bottling Electricity: Storage as a Strategic Tool for Managing Variability and Capacity Concerns in the Modern grid - A report by The Electricity Advisory Committee, December 2008. http://www.oe.energy.gov/DocumentsandMedia/final-energy-storage_12-16-08.pdf Accessed on 25 November 2010.
2. J. Makansi, J. Abboud, Energy Storage Council White Paper (2002).
3. M. Shimizu, M.S. N. Mori, Japan Patent - 63128560, 01/07/1988, (1988).