Positional Down Beating Nystagmus in 50 Patients: Cerebellar Disorders and Possible Anterior Semicircular Canalithiasis
JNNP 72:366-372, Bertholon,P.,et al, 2002
Oculogyric Crisis
In Ocular Differential Diagnosis, Lea & Febiger, Phila. 1975 p. 133, Roy,F.H., 1975