Bibliography

[] Donald Gray Miller. Resonance in Singing: Voice Building through Acoustic Feedback. Inside View Press. 2008. ISBN 978-0-9755307-5-7.

[] Wolfgang Saus. Oberton singen: Das Geheimnis einer magischen Stimmkunst. Traumzeit-Verlag. 2004. ISBN 3-933825-36-9.

[] C. T. Herbst, W. T. Fitch & J. G. Švec. Electroglottographic wavegrams: a technique for visualizing vocal fold dynamics noninvasively. Journal of the Acoustical Society of America 128:3070-3078. doi:10.1121/1.3493423.