Degenerative Diseases of the Nervous System, Hereditary Spastic Paraplagia
Adams & Victors Principles of Neurology, Chp 39, pg 1119, Ropper, A.H.,et al, 2014
Demyelinating Diseases
In Rowlands Merritt's Textbk of Neurology, Lea & Febiger, Phila, 8th Ed, p. 749, Sibley,W.A.,et al, 1989