WSZOŁEK, Wiesław; KŁACZYŃSKI, Maciej. Estimation Of The Vocal Folds Vibration Fundamental Frequency by Higer Order Spectrum. Archives of Acoustics, [S. l.], v. 33, n. 4(S), p. 183–188, 2008. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/856. Acesso em: 14 may. 2025.