Kondakov, B.V., S.S. Nazmutdinova, T.N. Chugaeva, E.L. Kavardakova, D.S. Popov, N.V. Chugaev, and N.E. Shpak. 2015. “THE RUSSIAN LANGUAGE: HISTORY, CIVILIZATION, CULTURE”. Perm Federal Research Centre Journal, no. 1 (June): 39-64. https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2015n1p6.