Stress,Depression and Anxiety in Primary Headache Sufferers: Evaluation by Means of the Scl-90–R.

Derogatis LR SCL-90-R administration, scoring and procedure manual I for the Revised version. Baltimore: Derogatis L.R. ed., 1977.

American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders Third edition-revised (DSM-III-R). Washington, DC: APA, 1987.

Headache Classification Committee of the International Headache Society: Classification and diagnosic criteria for Headache Disorders, Cranial Neuralgias and Facial Pain. Cephalalgia VIII, suppl. 7, 1988.