HARTMAN, D. E. Clinical investigation of intermittent breathy dysphonia. J Speech Hear Dis. 1981, 46, 428-432
MERSON, R. M. Spasmodic dysphonia : Abductor type. A clinical report of acoustic, aerodynamic and perceptual characteristics. Laryngoscope. 1981, 89, 129-139
ARONSON, A. E. Clinical voice disorders. An Interdisciplinary Approach. 1985, 157-197
BLITZER, A. B. Clinical and laboratory characteristics of laryngeal dystonia : A study of 110 cases. Laryngoscope. 1988, 98, 636-640
MARSDEN, C. D. Spastic dysphonia, Meige disease and torsion dystonia. Neurology. 1982, 32, 1202-1203