DystoniaNEJM 355:818-829, Tarsy,D. &Simon,D.K., 2006
The DystoniasBMJ 300:139-144, Marsden,C.D.&Quinn,N.P., 1990
Differential Diagnosis of Bilateral Abnormalities of the Basal Ganglia and ThalamusRadioGraphics 31:5-30, Hegde,A.N.,et al, 2011