1. The sphincter mechanism of velopharyngeal closure;Skolnick;Cleft Palate J,1973
2. Standardization for the reporting of nasopharyngoscopy and multiview videofluoroscopy;Golding-Kuschner;Cleft Palate J,1990
3. Patterns of velopharyngeal valving in normal and cleft palate subjects;Croft;Laryngoscope,1981
4. The dynamics of Passavant’s ridge in subjects with and without velopharyngeal insufficiency—A multiview videofluoroscopic study;Glaser;Cleft Palate J,1979
5. The Nature of the Velopharyngeal Mechanism. Cleft Palate Speech;McWilliams,1990