1. American Psychiatric Association (1980).Diagnostic and Statistical Manual of Mental Disorders (3rd. ed., DSM-III). Washington, DC: American Psychiatric Association.
2. American Psychiatric Association (1987).Diagnostic and Statistical Mannual of Mental Disorders (3rd ed., revised, DSM-III-R). Washington DC: American Psychiatric Association.
3. Bohman, M., Bohman, I. L., Björck, P. O. & Sjöholm, E. (1983). Childhood psychosis in a northern Swedish county: Some preliminary findings from an epidemiological survey. In M. H. Schmidt & H. Remschmidt (Eds.),Epidemiological Approaches in Child Psychiatry II (pp. 164–173). Stuttgart: Georg Thieme Verlag.
4. Bohman, M., Bohman, I. L. & Sjöholm-Lif, E. (1988).Childhood psychosis: To identify, understand and treat (in Swedish) (pp. 107–108). Stockholm: Almquist & Wicksell.
5. Chung, S. Y., Luk, S. L. & Lee, P. W. H. (1990). A follow-up study of infantile autism in Hong Kong.Journal of Autism and Developmental Disorders, 20 221–232.