Trill (music) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Trill (music)" in English language version.

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8,536^th place

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2^nd place

doi.org

Hakes, Jean; Shipp, Thomas; Doherty, E. Thomas (1988). "Acoustic characteristics of vocal oscillations: Vibrato, exaggerated vibrato, trill, and trillo". Journal of Voice. 1 (4). Raven Press: 326–331. doi:10.1016/S0892-1997(88)80006-7.

operanews.com

Hastings, Stephen. "Taking the Pulse of Pesaro". OPERA NEWS. Retrieved 22 September 2011.

youtube.com