Cohen, D. J.; Paul, R.; Volkmar, F. R. (1986). "Issues in the Classification of Pervasive and Other Developmental Disorders: Toward DSM-IV". Journal of the American Academy of Child Psychiatry. 25 (2): 213–220. doi:10.1016/S0002-7138(09)60228-4. PMID3700908.
nih.gov
pubmed.ncbi.nlm.nih.gov
Cohen, D. J.; Paul, R.; Volkmar, F. R. (1986). "Issues in the Classification of Pervasive and Other Developmental Disorders: Toward DSM-IV". Journal of the American Academy of Child Psychiatry. 25 (2): 213–220. doi:10.1016/S0002-7138(09)60228-4. PMID3700908.