Manochiopinig, Sriwimon, Apirag Chuangsuwanich, and Sitthichoke Taweepraditpol. “The Nasoendoscopy Study of Velopharyngeal Closure Patterns in Normal Thai Volunteers”. Siriraj Medical Journal 57, no. 5 (May 1, 2005): 118–121. Accessed May 4, 2024. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245585.