1. The contribution of aryepiglottic constriction to “ringing” voice quality: a videolaryngoscopy study with acoustic analysis videotape;Yanagisawa,1988
2. Videolaryngoscopy of several common voice qualities;Brewer,1975
3. Elements of voice quality: perceptual, acoustic, and physiologic aspects;Colton,1981
4. Supralaryngeal activity in a study of six voice qualities;Estill,1985
5. An EMG study of two voice qualities: nasal twang and opera with “squillo.”;Estill,1986