The Nonmotor Problems of Parkinson's Disease
The Neurologist 6:18-27, Friedman,J.H.&Fernandez,H.H., 2000
Abnormalities of Sleep in Patients with the Chronic Fatigue Syndrome
BMJ 306:1161-1164, Morriss,R.,et al, 1993
Fatigue Syndrome:Neurasthenia Revived, Psychiatric Illnesses are Worth Considering
BMJ 298:1199-1200, White,P., 1989