Neurologic Aspects of Cobalamin DeficiencyMedicine 70:229-245, Healton,E.B.,et al, 1991
Subacute Combined Degeneration of the Spinal CordIn Rowland's, Merritt's Textbk of Neurology, Lea & Febiger, Phila, 8th Ed, p. 691, Mancall,E.L., 1989