Disorders of the Nervous System Caused by Drugs, Toxins, and Chemical Agents, Diptheria
Adams & Victors Principles of Neurology Chp 43, pg 1217, Ropper, A.H.,et al, 2014
Unilateral Palatal Paralysis Caused by Lesion in the Corticobulbar Tract
Arch Neurol 41:782-784, Iwata,M., 1984