Disorders of the Nervous System Caused by Drugs, Toxins, and Chemical Agents, BotulismAdams & Victors Principles of Neurology Chp 43, pg 1218, Ropper, A.H.,et al, 2014
Delirious DeficiencyLancet 376:1362, Olsen,R.Q &Regis,J.T., 2010