1. Psychogenic disorders in neurology: frequency and clinical spectrum;Lempert;Acta Neurol Scand,1990
2. Psychogenic movement disorders: frequency, clinical profile, and characteristics;Factor;J Neurol Neurosurg Psychiatry,1995
3. Diagnostic and statistical manual for mental disorders fourth edition;American Psychiatric Association,1994
4. Phenomenology and psychopathology related to psychogenic movement disorders;Williams,1995
5. Psychiatric outcome in patients with a psychogenic movement disorder. A prospective study;Feinstein;Neuropsychiatr Neuropsychol Behav Neurol,2001