Books

Panos E. Papamichalis, Ph.D., "Practical Approaches to Speech Coding," NJ, 1987

Ken Steiglitz, "A Digital Signal Processing Primer," CA, 1996

Papers

J. L. Flanagan and R. M. Golden, "Phase Vocoder," Bell System Technical Journal, 1966

Jean Laroche and Marc Dolson, "New Phase-Vocoder Techniques For Pitch Shifting, Harmonizing and Other Exotic Effects," IEEE Workshop on app. Of sig. proc. To audio and acous., New Paltz, NY, 1997

Marc Dolson, "The Phase Vocoder, A Tutorial," Computer Music Journal, Vol. 10, No.4, Winter 1986

Websites

Dan Ellis, Audio resources website and sample matlab code
http://www.ee.columbia.edu/~dpwe/

Emanuel Borsboom, Channel vocoder website
http://www.nuel.ca/Vocoder