Roberts J, Price J, Nelson LM, Burchinal M, Hennon E, Barnes B. Receptive vocabulary, expressive vocabulary, and speech production of boys with fragile X syndrome in comparison to boys with Down syndrome. Am J Ment Retard. 2007 May 1;112:177-93.
Martin AV, Coffield K. Hemophilia: information for educators and communication disorders specialists. Poster presented at the American Speech-Language-Hearing Association; April 1997. [abstract] Perspect Lang Learn Educ. 1997 Apr; 4:13-5.