Progressive Multifocal Leukoencephalopathy: Epidemiology, Clinical Manifestations, and Diagnosis
www.UptoDate.com, May, Koralnik, I.J., 2018
Neurologic Manifestations in Sarcoidosis
Ann Int Med 87:336, Delaney,P., 1977
Acquired Pendular Nystagmus with Oscillopsia in Multiple Sclerosis:A Sign of Cerebellar Nuclei Disease
JNNP 37:570, Aschoff,J.C.,et al, 1974