Managing the Neuropsychiatric Symptoms of Parkinson's Disease
Neurol 50:S33-S38, Lieberman,A., 1998
Disorders of the Nervous System Caused by Drugs, Toxins, and Chemical Agents, Sedative-Hypnotic Drugs
Adams & Victors Principles of Neurology Chp 43, pg 1206, Ropper, A.H.,et al, 2014