1. The Science of Voice;Stanley,1929
2. Chest Voice-Belting;Howell,1978
3. The Broadway voice part 1: just singin' in the pain;Osborne;High Fidelity,1979
4. Observations about the quality called belting;Estill,1980
5. Belting and classic voice quality: some physiological differences;Estill;Med Probl Perform Art,1988