1. The Management of Voice Disorders;Morrison,1994
2. Understanding Voice problems;Colton,1996
3. Muscular tension dysphonia;Morrison;J Otolaryngol,1983
4. The pathophysiology of spasmodic dysphonia and its modification by botulinum toxin;Ludlow,1990
5. Acoustic changes in spasmodic dysphonia after botulinum toxin injection;Zwirner;J Voice,1991