1. Muscle misuse voice disorders: description and classification;Morrison;Acta Otolaryngol,1993
2. Understanding Voice Problems: A Physiological Perspective for Diagnosis and Treatment;Colton,1990
3. Differential diagnosis and treatment of psychogenic voice disorder;Schalen;Clin Otolaryngol,1992
4. The importance of biographical anaimnesis in the treatment of functional voice disorders;Bauer;Sprache Stimme Gehor,1980
5. The clinical definition of psychogenic dysphonia during changing times;Schulte-Holthausen;Sprache Stimme Gehor,1981