1. Worldwide Student Numbers Forecast to Double by 2025. Available at: http://www.universityworldnews.com/article.php?story=20120216105739999
2. Skol’ko lyudei s vysshim obrazovaniem v mire? (2016) [How Many People Have Higher Education?] Available at: https://interstate-education.com/2016/10/30/skolko-lyudej-s-vysshimobrazovaniem-v-mire (In Russ.); Educational attainment and labour-force status. Available at: http://stats.oecd.org/Index.aspx?DataSetCode=EAG_NEAC
3. Rossiya v tsifrakh 2018 Krat. stat. sb./[Russia in Figures 2018. Brief statistical compendium]. Rosstat Publ., 2018. 522 p. Available at: http://www.gks.ru/free_doc/doc_2018/rusfig/rus18.pdf (In Russ.)
4. Sheregi, F.E., Rybakovskiy, L.L., Aref’ev, A.L., Savinkov, V.I. (2013).Chislennost’ uchashchikhsya i personala obrazovatel’nykh uchrezhdenii Rossiiskoi Federatsii (Prognoz do 2020 goda i otsenka tendentsii do 2030 goda) [Number of Students and Staff of Educational Institutions of the Russian Federation (Forecast up to 2020 and the Assessment of Trends up to 2030)]. Мoscow: Center for Social Forecasting and Marketing. 164 p. (In Russ.)
5. Merton, R.K. (1967). On Sociological Theories of the Middle Range. In: Robert K. Merton. On Theoretical Sociology. Five Essays. Old and New. N.-Y.: Free Press, L.: Macmillan, pp. 68-69.