DystoniaNEJM 355:818-829, Tarsy,D. &Simon,D.K., 2006
Therapeutic Uses Of Botulinum ToxinNEJM 324:1186-1194, Jankovic,J.&Brin,M.F., 1991
Clinical Aspects of Spasmodic DysphoniaJNNP 41:361, Aminoff,M.J.,et al, 1978