Retinitis Pigmentosa
Surv Ophthalmol 33:137-177, Pagon,R.A., 1988
Assessment: Vestibular Testing Techniques in Adults and Children
Neurol 55:1431-1441, Fife,T.D.,et al, 2000
Vertigo of Vascular Origin, Clinical and Electronystagmographic Features in 84 Cases
Arch Neurol 46:281-284, Grad,A.&Balch,R.W., 1989