Kelley, Matthew C., and Daniel Aalto. “Measuring the Dispersion of Density in Head and Neck Cancer patients’ Vowel Spaces: The Vowel Dispersion Index”. Canadian Acoustics 47, no. 3 (October 16, 2019): 114–115. Accessed March 28, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3330.