Валипур, А. and Джамалзад, М. (2021) “Analysis Acoustical Formants Russian Fricative Consonants in Comparison with the Pronunciation of Iranian Students”, Issledovatel’skiy Zhurnal Russkogo Yazyka I Literatury, 9(2), pp. 11–25. doi: 10.52547/iarll.18.11.