1. Averre D. (2007), “Sovereign Democracy” and Russia’s Relations with the European Union, https://demokratizatsiya.pub/archives/15_2_9140268038203250.pdf, 18.01.2021.
2. Bíró-Nagy A. (2017), Illiberal Democracy in Hungary: The Social Background and Practical Steps of Building an Illiberal State, https://www.researchgate.net/profile/Andras-Biro-Nagy/publication/316994178_Illiberal_Democracy_in_Hungary_The_Social_Background_and_Practical_Steps_of_Building_an_Illiberal_State/links/591c994ba6fdcc233fcbb1fc/Illiberal-Democracy-in-Hungary-The-Social-Background-and-Practical-Steps-of-Building-an-Illiberal-State.pdf, 11.02.2021.
3. Bracho G., Lopez J. (2005), The economic collapse of Russia, Universidad Nacional Autónoma de Mexico, 14.02.2005, https://www.researchgate.net/profile/Julio_Lopez7/publication/228567250_The_economic_collapse_of_Russia/links/54abf9ef0cf2bce6aa1dd64f/The-economic-collapse-of-Russia.pdf, 04.02.2021.
4. Cederfelt M. (2020), The Nemtsov Murder and Rule of Law in Russia, Organization for Security and Co-operation in Europe, 30.07.2020, https://www.oscepa.org/documents/officers-of-the-assembly/margareta-cederfelt-sweden/3971-the-nemtsov-murder-and-rule-of-law-in-russia-report-by-osce-pa-vice-president-margareta-cederfelt-20-february-2020/file, 04.02.2021.
5. Domańska M. (2019), Gagging Runet, silencing society. ’Sovereign’ Internet in the Kremlin’s political strategy, https://core.ac.uk/download/pdf/286731435.pdf, 14.02.2021.