1. Aronson, A. E., & Bless, D. M. (2011). Clinical voice disorders (4th ed.). New York, NY: Thieme Publishing.
2. Back, L. (2007). The art of listening. London, UK: Berg.
3. Bailey, B. (1996). Laryngoscopy and laryngoscopes—Who’s first? The forefathers/four fathers of laryngology. The Laryngoscope, 106(8), 939–943.
4. Baron, B. C., & Dedo, H. H. (1980). Separation of the larynx and trachea for intractable aspiration. The Laryngoscope, 90(12), 1927–1932.
5. Barthes, R. (1977). The grain of the voice (S. Heath, Trans.). In R. Barthes (Ed.), Image-music-text (pp. 179–189). London, UK: Fontana.