S. Jaruvattanadilok, C. Kasirawat, W. Ko-iam, N. Sonsuwan, and K. Khwangern, “Influence of the Frequency of Speech Therapy on the Velopharyngeal Gap in Cleft Lip and Palate Patients After Primary Palatoplasty”, BSCM, vol. 65, no. 2, pp. 229–235, Apr. 2026.