Ngoc-Quang, Nguyen. “Etude Acoustique Comparative Des Tons "hoi" - ‘nga’ En Vietnamien Du Nord Et Du Sud”. Canadian Acoustics 22, no. 3 (September 1, 1994): 143–144. Accessed November 23, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/890.