1. Fasmer M. Etimologicheskiy slovar’ russkogo yazyka: in 4 t. [Etymological Dictionary of the Russian Lan-guage: in 4 vols.]. 4th ed. Moscow, Progress, Astrel Publ., 1986, 2004, vol. 1, 576 p. (In Russian).
2. Kuznetsov G.A. Etimologicheskiy slovar’ russkogo yazyka [Etymological Dictionary of the Russian Lan-guage]. St. Petersburg, Poligrafuslugi Publ., 2005, 432 p. (In Russian).
3. Dal V.I. Tolkovyy slovar’ zhivogo velikorusskogo yazyka: v 4 t. [Explanatory Dictionary of the Living Great Russian Language: in 4 vols.]. St. Petersburg, Moscow, M.O. Wolf’s Typography, 1880–1882, 2000, vol. 1, 812 p. (In Russian).
4. Kuznetsov S.A. (ed.-in-chief). Noveyshiy bol’shoy tolkovyy slovar’ russkogo yazyka [The Newest Large Dictionary of the Russian Language]. St. Petersburg, Moscow, Norint, Ripol Classic Publ., 2008, 1534 p. (In Russian).
5. Stepin V.S., Guseynov A.A., Semigin G.Y., Ogurtsov A.P. (scientific editorial council). Novaya filosofskaya entsiklopediya: v 4 t. [New Philosophical Encyclopedia: in 4 vols.]. Moscow, Mysl Publ., 2010, vol. 1, 744 p. (In Russian). Available at: https: //alleng.org/d/phil/phil078.htm (accessed 15.01.2019).