1. History of voice rehabilitation following laryngectomy;Bień;Laryngoscope,2008
2. Otolaryngology. An illustrated history;Weir,1990
3. Ueber die erste durch Th. Billroth am Menschen ausgeführte Kehlkopf-Exstirpation und die Anwendung eines künstlichen Kehlkopfes;Gussenbauer;Arch Klin Chir Berlin,1874
4. Merriam-Webster Dictionary. 2014. Available at: http://www.merriam-webster.com/dictionary/voice. Accessed October 1, 2014.
5. Surgical voice restoration after total laryngectomy: an overview;Elmiyeh;Indian J Cancer,2010