BABEL, M.; LAWLER, Z.; NORTON, C. Perceptual Learning of speech sounds: A bias for ’sipper’ over ’zipper’?. Canadian Acoustics, [S. l.], v. 44, n. 3, 2016. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2913. Acesso em: 3 dec. 2021.