1. Stuttering and the basal ganglia circuits: a critical review of possible relations;Alm;Journal of Communication Disorders,2004
2. American Psychiatric Association (2000). Diagnostic and statistical manual of mental disorders: DSM-IV-TR. (4th ed.) Washington, DC: American Psychiatric Association.
3. Becker, L. (2000). Effect size (ES). Internet. Retrieved October 31, 2004, from http://web.uccs.edu/lbecker/Psy590/es.htm.
4. Short lead interval startle modification;Blumenthal,1999
5. The pharmacology of stuttering: A critical review;Brady;American Journal of Psychiatry,1991