KUBZDELA, H.; OWSIANNY, M. The effect of formant levels on the perception of synthetic vowel sounds. Archives of Acoustics, [S. l.], v. 19, n. 2, p. 173–183, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/1086. Acesso em: 25 apr. 2025.