1. L. A. Melent’ev, Systems Investigations in Power Engineering (Nauka, Moscow, 1983) [in Russian].
2. L. S. Belyaev, B. G. Saneev, S. P. Filippov, et al., System Investigations of Power Engineering Problems, Ed. by N. I. Voropai (Nauka, Novosibirsk, 2000) [in Russian].
3. L. S. Khrilev and I. A. Smirnov, “Socio-Economic Principles and Lines of Development of District Heating,” Teploenergetika, No. 2, 9–17 (2005) [Therm. Eng., No. 2 (2005)].
4. A. I. Bashmakov, “An Analysis of Major Trends in Development of Heat Supply Systems in Russia,” Novosti Teplosnab., No. 2, 6–10 (2008); No. 3, 12–24 (2008).
5. Housing and Consumer Services for Population in Russia. Statistical Reports (Rosstat, Moscow, 2007) [in Russian].