1. V. E. Fortov and O. S. Popel’, The Power Engineering of Russia in the Modern World (Intellekt, Dolgoprudnyi, 2010) [in Russian].
2. O. S. Popel’, “Renewable Sources of Energy: Their Role and Place in Modern and Future Power Engineering,” Ross. Khim. Zh. 52(6), 95–106 (2008).
3. O. S. Popel’, S. E. Frid, E. E. Shpil’rain, et al., “Independent Hydrogen Power Installations with Renewable Sources of Energy,” Therm. Eng., No. 3, 208 (2006).
4. Bottling Electricity: Storage as a Strategic Tool for Managing Variability and Capacity Concerns in the Modern Grid, EAC Report, December, 2008, http://www. oe.energy.gov./eac.htm .
5. C. V. Ramana, A. Mauger, F. Gendron, et al., “Study of the Li-Insertion/Extraction Process in LiFePO4/FePO4,” J. Power Sources 187, 555–564 (2009).