Periodic Alternating Nystagmus with Downward Beating Nystagmus, A Clinicoanatomical Case Study of Multiple Sclerosis
Arch Neurol 30:399-402, Keane,J.R., 1985
Primary Position Upbeating Nystagmus:A Variety of Central Positional Nystagmus
Brain 106:949-964, Fisher,A.,et al, 1983
Acquired Pendular Nystagmus with Oscillopsia in Multiple Sclerosis:A Sign of Cerebellar Nuclei Disease
JNNP 37:570, Aschoff,J.C.,et al, 1974
Upbeat Nystagmus
JAMA 225:312, Daroff,R.B.,et al, 1973