1. Kolesov E.S. [The concept of risk-based internal control of efficiency of economic activities]. Innovatsionnoe razvitie ekonomiki = Innovative Development of Economy, 2016, no. 1, pp. 178–183. URL: Link (In Russ.)
2. Agentova G.V. Statistical estimation of unobserved economic activity]. Vestnik Rossiiskogo ekonomicheskogo universiteta imeni G.V. Plekhanova = Vestnik of Plekhanov Russian University of Economics, 2016, no. 1, pp. 59–69. URL: Link (In Russ.)
3. Sakhbieva A.I. [Features of consumer perception of the "shadow" format of the digital economy]. Modern Economy Success, 2021, no. 1, pp. 175–179. (In Russ.) URL: Link
4. Minina T.I., Ostanina A.R. [New approaches to the definition of a concept of the shadow economy as the threat of economic safety of the Russian Federation]. Khronoekonomika = Chronoeconomics, 2018, no. 3, pp. 128–131. URL: Link (In Russ.)
5. Saninskii R.A. [The concept and features of shadow economy]. Yuridicheskaya nauka i praktika: Vestnik Nizhegorodskoi akademii MVD Rossii = Legal Science and Practice: Journal of Nizhny Novgorod Academy of Ministry of Internal Affairs of Russia, 2018, no. 2, pp. 250–254. (In Russ.) URL: Link