1. The linguistic use of different phonation types;Ladefoged,1983
2. Toward a taxonomy of non-modal phonation;Gerratt;J Phon,2001
3. The Phonetic Description of Voice Quality;Laver,1980
4. Marasek K. Electroglottographic description of voice quality. [Habilitationsschrift. Institute für Maschinelle Sprachverarbeitung]. Doctoral dissertation. University of Stuttgart; 1997.
5. Strobophotoglottographic transillumination as a method for the analysis of vocal fold vibration;Hess;J Voice,2000