Infections of the Nervous System, (Bacterial, Fungal, Spirochetal, Parasitic) and Sarcoidosis, Neurosyphilis
Adams & Victors Principles of Neurology, Chp 32, pg 723, Ropper, A.H.,et al, 2014
Internal Ophthalmoplegia, In Ocular Differential Diagnosis
Lea & Febiger, Phila. p 3375., Roy,F.H., 1975