1. Russian Statistical Yearbook 2017: Stat. book, Rosstat, R76 Moscow, (2017).
2. S.G. Sheina, A.A. Khamavova, S.R. Pseunova, Conceptual studies of Urban Environment Quality Improvement Problems, Construction Engineering Journal. 6 (982) (2016) 50-51.
3. S.G. Sheina, S.A. Tikhomirov, E.N. Minenko, Implementation of green building project within the example of Techno-Eco-park, Rostov-on-Don, International Journal of Applied Engineering Research. 10 (12) (2015) 31389-31402.
4. Information on http://www.gks.ru.
5. Information on http://www.oecd.org.