Aaen M, McGlashan J, Christoph N, Sadolin C, et al. Extreme Vocal Effects Distortion, Growl, Grunt, Rattle, and Creaking as Measured by Electroglottography and Acoustics in 32 Healthy Professional Singers. J Voice 2021 Dec 28. pii: S0892-1997(21)00391.
PMID: 34972633