Lauretta, C., M. Schellenberg, and B. Gick. “Cross-Linguistic Bracing: A Lingual Ultrasound Study of Six Languages”. Canadian Acoustics, vol. 45, no. 3, Aug. 2017, pp. 186-7, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3114.