CHEM, Vatho, and Vatho CHEM. “The Standard Khmer Vowel System: An Acoustic Study”. Cambodia Journal of Basic and Applied Research 2, no. 2 (December 31, 2020): 57–88. Accessed May 19, 2024. https://cjbar.rupp.edu.kh/index.php/cjbar/article/view/36.