7Robert Deterson MD. Speech development [J]. Clin Plast Surg, 1990,17(1):23.
8Poppelreuter S, Engelke W, Bruns T. Quantitative analysis of the velopharyngeal sphincter function during speech[J]. Cleft Palate Craniofac J, 2000, 37 (2) : 157-165.
9Barsoumian R, Kuehn DP, Moon JB, et al. An anatomic study of the tensor veil palatini and dilatator tubae muscles in relation to eustachian tube and velar function [J]. Cleft Palate Craniofac J, 1998, 35 (2) : 101-110.
10Gannon PJ. Functional compartments of the tensor veli palatini muscle[J]. Arch Otolaryngol Head Neck Surg, 1994,120(12) : 1382- 9.
