Scarsellone, J. M., A. P. Rochet, and J. F. Wolfaardt. “Denture Influence on Resonance Balance in Speech”. Canadian Acoustics, vol. 26, no. 3, Sept. 1998, pp. 82-83, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1168.