1) Smith E, Taylor M, Mendoza M et al : Spasmodic dysphonia and vocal fold paralysis : outcomes of voice problems on work-related functioning. J Voice 12 : 223-232, 1998.
2) Bielamowicz S, Berke GS, Kreiman J et al : Effect of tension, stiffness, and airflow on laryngeal resistance in the in vivo canine model. Ann Otol Rhinol Laryngol 102 : 761-768, 1993.
4) Titze IR : Voice training and therapy with a semi-occluded vocal tract : rationale and scientific underpinnings. J Speech Lang Hear Res 49 : 448-459, 2006.
5) Hong KH, Kim HK : Diplophonia in unilateral vocal fold paralysis and intracordal cyst. Otolaryngol Head Neck Surg 121 : 815-819, 1999.