1. Congenital and acquired palatopharyngeal insuffiency;Bradley,1979
2. Motor Speech Disorders;Darley,1975
3. The Fisher-Logemann Test of Articulation Competence;Fisher,1971
4. Palatal lift prosthesis for treatment of anatomic and neurologic palatopharyngeal insufficiency;Gonzalez;Cleft Palate Journal,1970
5. Surgical and prosthetic management of neurogenic speech disorders;Johns,1978