1. Autism and Developmental Disabilities Monitoring (ADDM) Network, 2010.
2. The Biology of the Autistic Syndromes;Gillberg,2000
3. American Psychiatric Association, Diagnostic and Statistical Manual of Mental Disorders - Fourth Edition (DSM-IV), American Psychiatric Publishing, Washington D.C, 1994
4. Wong, Hui, Lee, (2004); Howlin & Asgharian (1999).
5. Autism Resource Foundation, Physical Therapy Exercises for Autistic Children http://autismresourcefoundation.org/.