1. Diagnostic and statistical manual of mental disorders, fourth edition text revision (DSM-IV-TR). Washington DC: APA; 2000.
2. Criteria, categories, and continua: autism and related disorders in DSM-5;Happe;Journal of the American Academy of Child and Adolescent Psychiatry,2011
3. Prevalence of autism spectrum disorders—autism and developmental disabilities monitoring network. MMWR Surveillance Summaries. United States, 2006. December 18 2009;58(10):1–20.
4. Prevalence of autism spectrum disorders—Autism and developmental disabilities monitoring network. MMWR Surveillance Summaries, 14 sites. United States, 2008. Mar 30 2012;61(3):1–19.
5. Prevalence of autism spectrum disorders in a total population sample;Klinger;American Journal of Psychiatry,2011