1. Allik, H., Larsson, J. O., & Smedje, H. (2006). Sleep patterns of school-age children with Asperger syndrome or high-functioning autism. Journal of Autism and Developmental Disorders, 36, 585–595.
2. American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
3. American Psychiatric Association. (1987). Diagnostic and statistical manual of mental disorders (3rd edn., Revised). Washington, DC: Author.
4. American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: APA Press.
5. American Psychiatric Association. (2000). Diagnostic and statistical manual of mental Disorders (4th edn., Text Revision). Washington, DC: Author.