1. The ICD-10 classification of mental and behavioural disorders;World Health Organization,1992
2. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,1994
3. Idiopathic subjective tinnitus treated by biofeedback, acupuncture and drug therapy;Podoshin;Ear Nose Throat J,1991
4. Subjective idiopathic tinnitus;Shulman;Am J Otolaryngol,1992
5. Chronic tinnitus;Harrop-Griffiths;J Psychosom Res,1987