Flowers, Heather, Tim Bressmann, Brent Carmichael, Chiang-Le Heng, and Willy Wong. “Reconstructing Three-Dimensional Tongue Trajectories Using Multiplanar Paced Sonography”. Canadian Acoustics 33, no. 4 (December 1, 2005): 50–51. Accessed January 16, 2022. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1779.