Rodrigo-Claverol M, Malla-Clua B, Rodrigo-Claverol E, Jove-Naval J, Bergada-Bell-Iloc J, Marsal-Mora JR. Animal-assisted therapy for the emotional well-being of children with intellectual disabilities and behavioral disorders. Sociology and Anthropology. 2018 Jan;6(1):94-106. doi: 10.13189/sa.2018.060109
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.