1. Gogiberidze G. M., World of press, 51–62 (2017)
2. Laza V. D., World of press, 39–46 (2017)
3. Lutsenko L. M., Lutsenko Y. V., Lesnoy vestnik, 2, 238–243 (2016)
4. Nazarov V. L., Suslonov P. E., Publish House of the Ural University (2018)
5. Parshina A. A., Polyanichko N. E., Guterman L. A., Theory and practice of soc. Develop, 19, 117–121 (2014)