1. The Speech Chain;Denes,1964
2. Oral Deformaties;Kingsley,1887
3. On the Production of Articulate Sound;Oakley-Coles;Trans. Odontol. Soc. Great Britain,1872
4. Speech Defects Associated with Dental Abnormalities and Malocclusions;Bloomer,1957
5. Improved Phonetics in Denture Construction;Allen;J. Prosthet. Dent.,1958