Positional Down Beating Nystagmus in 50 Patients: Cerebellar Disorders and Possible Anterior Semicircular Canalithiasis
JNNP 72:366-372, Bertholon,P.,et al, 2002
Acquired Pendular Nystagmus with Oscillopsia in Multiple Sclerosis:A Sign of Cerebellar Nuclei Disease
JNNP 37:570, Aschoff,J.C.,et al, 1974