[1]
J. IMIOŁCZYK, “Determination of perceptual boundaries between the male, female and child’s voices in isolated synthethic Polish vowels”, Arch. Acoust., vol. 16, no. 2, pp. 305–323, Jun. 1991, Accessed: Apr. 19, 2026. [Online]. Available: http://acoustics.ippt.gov.pl/index.php/aa/article/view/1233