Autocorrelation-based pitch determination algorithms for realtime vocoders with the TMS32020/C25. - Nick Tsakalos; Evangelos Zigouris (Microprocess. Microsystems, 1990)

Use of a single chip fixed-point DSP for multiple speech channel vocoders. - Nick Tsakalos; Evangelos Zigouris (Microprocess. Microsystems, 1994)