Soto-Barba, Jaime, Isolina Lara, and Gastón Salamanca. “Acoustic-Phonetic Description of the Sixth Vowel of the Spoken Chedungun in Alto Bío-Bío”. Onomázein , no. 34 (December 31, 2016): 229–241. Accessed February 13, 2025. https://revistadisena.uc.cl/index.php/onom/article/view/31077.