Gick, Bryan, Ian Stavness, Chenhao Chiu, and Sidney Fels. “Categorical Variation in Lip Posture Is Determined by Quantal Biomechanical-Articulatory Relations”. Canadian Acoustics 39, no. 3 (September 1, 2011): 178–179. Accessed March 4, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2469.