1. Acoustic Theory of Speech Production;Fant,1970
2. “Synthetic voices for computerj”;Flanagan;IEEE Spectrum,1970
3. Speech Analysis, Synthesis and Perception;Flanagan,1972
4. Modulation Theory;Black,1953
5. “Adaptive quantization in differential PCM coding of speech”;Cummiskey;Bell Syst. Tech. J.,1973