Babel, Molly, Zoe Lawler, and Carolyn Norton. “Perceptual Learning of Speech Sounds: A Bias for ’sipper’ over ’zipper’?”. Canadian Acoustics 44, no. 3 (August 24, 2016). Accessed April 24, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2913.