DystoniaNEJM 355:818-829, Tarsy,D. &Simon,D.K., 2006
Catecholamines & Neurologic DiseasesNEJM 293:274, Moskowitz,M.A.,et al, 1975
Diseases of Muscles-Clinical Manifestations & Differential DiagnosisThe New Physic 263, 1967, Oct., Boshes,L., 1967