Friedreich AtaxiaIn Rowland, L. P. Merritt's Textbook of Neurology, 8th Ed, Lea & Febiger, Phila, Ch 13, p627, Rosenberg,R.N., 1989
Unilateral Intracranial Optic Nerve InvolvementArch Ophthalmol 73:331, Little,H.L.,et al, 1965