Degenerative Diseases of the Nervous System, Friedreich Ataxia
Adams & Victors Principles of Neurology, Chp 39, pg 1102, Ropper, A.H.,et al, 2014
Refsum Disease
In Rowland's Merritt's Textbk of Neurology, Lea & Febiger, Phila, 8thEd, p. 509, Menkes,J.H., 1989