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Laryngeal evidence for the first and second passaggio in professionally trained sopranos
- Matthias Echternach,
- Fabian Burk,
- Marie Köberlein,
- Andreas Selamtzis,
- Michael Döllinger,
- Michael Burdumy,
- Bernhard Richter,
- Christian Thomas Herbst
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- Published: May 3, 2017
- https://doi.org/10.1371/journal.pone.0175865