BALBONAS, D.; DAUNYS, G. 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: 25 apr. 2024.