1. Dudley, H., Tarnoczy, T.H.: The speaking machine of Wolfgang von Kempelen. J. Acoust. Soc. Am. 22, 151–166 (1950)
2. Parsons, T.: Voice and Speech Processing. McGraw-Hill, New York (1986)
3. Fant, G.C.M.: Acoustic Theory of Speech Production. Mouton, Gravenhage (1960)
4. Deller, J.R., Proakis, J.G., Hansen, J.H.L.: Discrete-Time Processing of Speech Signals. Prentice-Hall, Englewood Cliffs (1993)
5. O’Shaughnessy, D.: Speech Communication: Human and Machine. Addison-Wesley, Reading (1987)