А. Борисовна Лихачева, “On the Articulatory Aspect of the Presentation of the System of Russian Sounds to Non-native University Students of Russian Philology”, SV, vol. 55, no. 2, pp. 113–122, Dec. 2010, Accessed: May 15, 2024. [Online]. Available: https://www.journals.vu.lt/slavistica-vilnensis/article/view/26917