1. Allen, J., DeMyer, M. K., & Norton, J. A. (1971). Intellectuality in parents of psychotic, subnormal, and normal children.Journal of Autism and Childhood Schizophrenia, 1, 311–326.
2. American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
3. Bernal, J., & Richards, M. P. M. (1970). The effects of bottle and breast feeding on infant developoment.Journal of Psychosomatic Research, 14, 247.
4. Bohman, M., Bohman, I. L., & Björch, P. O. (1983). Childhood psychosis in a northern swedish country. In M. H. Schmidt & H. Remschmidt (Eds.),Epidemiological approaches in child psychiatry (Vol. 2, pp. 164–173). New York: Thieme-Stratton.
5. Chess, S. (1977). Follow-up report on autism in congenital rubella.Journal of Autism and Childhood Schizophrenia, 7, 69–81.