1. Clinical experience in restoring oral communication to 274 laryngectomized patients by esophageal voice;Heaver;J Amer Geriat Soc,1955
2. Use of electrolarynx in speech rehabilitation;Leuders;Arch Otolaryng,1956
3. Evolution of artificial speech aids and their value for rehabilitation. Alleviation of alaryngeal aphonia with the modern artificial larynx;Arnold;Logos,1960
4. Ueber die erste durch Th. Billroth am Menschen ausgefuhrte Kehlkopf-Exstirpation un die Anwendung eines Kunstlichen Kehlkopfes;Gussenbauer;Arch Klin Chir,1874
5. Pseudostimme nach Totalexstirpation des Larynx;Gottstein;Arch Klin Chir,1900