COFRÉ VERGARA, V.; MONTES DE OCA, D. R.; SIMÓN CASAS, F. J. KEITH JOHNSON (2003): Acoustic & Auditory Phonetics, Blackwell, Oxford 2a edición. Journal of Experimental Phonetics, [S. l.], v. 15, p. 211–239, 2006. Disponível em: https://revistes.ub.edu/index.php/experimentalphonetics/article/view/44350. Acesso em: 25 dec. 2024.