Internuclear Ophthalmoplegia, Typical & Atypical
Arch Ophthal 84:583, Cogan,D.G., 1970
Downbeat Nystagmus: Aetiology and Comorbidity in 117 Patients
JNNP 79:672-677, Wagner,J.N.,et al, 2008
Downbeating Nystagmus
Arch Neurol 40:777-784, Halmagyi,G.M.,et al, 1983