H. Hollien, and G. Moore. Journal of Speech and Hearing Research, (1960)p.164: It becomes apparent (Figure 2) that for none of the conditions of phonation are a subject's vocal folds as long as they are for that subject at rest.
N. Kiyotaki, and J. Moore. Journal of Political Economy, 105 (2):
211-48(April 1997)available at http://ideas.repec.org/a/ucp/jpolec/v105y1997i2p211-48.html.