Disorders of the Nervous System Caused by Drugs, Toxins, and Chemical Agents, LeadAdams & Victors Principles of Neurology Chp 43, pg 1220, Ropper, A.H.,et al, 2014
Orofacial Dyskinesia in Stupor and ComaNeurol 38:1331-1332, Noda,S.,et al, 1988