G. DEMENKO, A. WAGNER, and N. CYLWIK, “The Use of Speech Technology in Foreign Language Pronunciation Training”, Arch. Acoust., vol. 35, no. 3, pp. 309–329, Sep. 2010, Accessed: Apr. 18, 2026. [Online]. Available: http://acoustics.ippt.gov.pl/index.php/aa/article/view/227