Degenerative Diseases of the Nervous System, Dystonia Musculorum Deformans
Adams & Victors Principles of Neurology, Chp 39, pg 1099, Ropper, A.H.,et al, 2014
Unilateral Pallidotomy for Parkinson's Disease:Results after More Than 1 Year
JNNP 67:511-517, Schrag,A.,et al, 1999