Parkinsonism Following Dystonia in Three Patients
Movement Disorders 1:151-157, Katchen,M.&Duvoisin,R.C., 1986
Blepharospasm-oromandibular Dystonia Dyndrome (Brueghel's syndrome) :A Variant of Adult-onset Torsion Dystonia
JNNP 39:1204, Marsden,C.D., 1976