1. V. E. Fortov and O. S. Popel’, Power Engineering in Modern World (Intellekt, Dolgoprudnyi, 2011) [in Russian].
2. G. V. Tomarov, A. I. Nikol’skii, V. N. Semenov, A. A. Shipkov, and B. E. Parshin, “Trends and Prospects of Development of Geothermal Power Engineering,” Therm. Eng. 59(11), 831 (2012).
3. L. Rybach, “Status and Prospects of Geothermal Energy,” in Proc. World Geothermal Congress-2010 (Bali (Indonesia), 2010).
4. R. Bertani, “Geothermal Power Generation in the World 2005–2010 Update Report,” in Proc. World Geothermal Congress-2010 (Bali (Indonesia), 2010).
5. M. K. Kurbanov, Geothermal and Hydromineral Resources of East Caucasus and Ciscaucasia (Nauka, Moscow, 2001) [in Russian].