1. On matching the speech signal to mechanisms of production;Abramson;Journal of the Acoustical Society of America,1967
2. Perception of voicing in English affricates and fricatives;Cole;Journal of the Acoustical Society of America,1975
3. Comparing Phonetic Features of English, French, German and Spanish;Delattre,1965
4. Acoustic Theory of Speech Production;Fant,1960
5. Devoicing of voiced fricatives;Haggard,1969