1. Akimov, S.S.: The relationship between the development of the digital economy and investment activities (2018). http://uecs.ru/index.php?option=com_flexicontent&view=items&id=5252
2. Belyaev, E.V., Scheglakova, A.K.: The digital economy as the direction of improving the efficiency of branches of national economy. Bull. Ivanovo State Univ. 4(34), 18–22 (2017)
3. Federal State Statistics Service of the Russian Federation: Russia in figures: Short statistical collection (2018). http://www.gks.ru/free_doc/doc_2018/rus18.pdf
4. Federal State Statistics Service of the Russian Federation (n.d.): Investments. https://www.gks.ru/wps/wcm/connect/rosstat_main/rosstat/en/figures/investments
5. Federal Tax Service of Russia (n.d.): Normative legal acts published and developed by the Federal Tax Service of Russia. https://www.nalog.ru/rn77/about_fts/docs_fts/?n=&fd=&dt=0&do=0&st=-1&chFeeral=true&rbAllRegions=false&rbRegionSelected=true&ddlRegion=3245