References
- Titze I.R. Vocology. Nat. Assoc. Teachers Singing Journal 1990; 46: 21–22
- Titze, I.R. Principles of Voice Production, Englewood Cliffs, NJ: Prentice Hall (1994). Reprinted by the National Center for Voice and Speech, Denver, CO 80204 (2000).
- Titze I.R., Laukkanen A.M., Finnegan E.M., Jaiswal S. Raising lung pressure and pitch in vocal warm-ups: the use of flow-resistant straws. J. Singing 2002; 58: 329–338