Simulation of Spectral Movement of Vowels using Acoustical Tube. Elektronika ir Elektrotechnika, [S. l.], v. 96, n. 8, p. 62–64, 2009. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/9968.. Acesso em: 5 dec. 2025.