Diseases of the Nervous System Caused by Nutritional Deficiency, Vitamin B12 (Cobalamin) Deficiency (Subacute Combined Degeneration)
Adams & Victors Principles of Neurology Chp 41, pg 1172, Ropper, A.H.,et al, 2014
Visual Dysfunction in Optic Tract Lesions
et al. , Ann Neurol 3:187978., Bender,M.B., 1978