Park EM, Wang M, Bowers SM, Muriel AC, Rauch PK, Edwards T, Yi SM, Daniel B, Hanson LC, Song M-K. Adaptation and psychometric evaluation of the parenting concerns questionnaire-advanced disease. Am J Hosp Palliat Care. 2021 Oct 7. doi: 10.1177/10499091211049801
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.