1. American Psychiatric Association (APA), (1994). Diagnostic and Statistical Manual of Mental Retardation. (4th ed.) American Psychiatric Press, Washington.
2. Does the autistic child have a “theory of mind”?;Baron-Cohen;Cognition,1985
3. Frequency of the fragile X syndrome in infantile autism;Blomquist;A Swedish multicenter study. Clin. Genet.,1985
4. Follow-up report on autism in congenital rubella;Chess;Journal of Autism Child Schizophrenia,1977