5.        Gesell A., Amatruda C. Developmental diagnosis., N.Y., 1974

6.        Fantz R.L., Pattern vision in the newborn., Science. 1963, 40, 296-297

7.        Hermelin B., O'Connor N. Psychological experiment with autistic children. Oxford, 1970.

8.        Hermelin B., O'Connor N. Logico-affective states and nonverbal language. In E. Schopler, G. Mesibov (eds) Communication problem in autism. N.Y.-L. 1985.

9.        Hutt S.J., Hutt C., Lee D., Ounsted C., Arousel and childhood autism. Nature, 1964, 204, 908-909.

10.    Kanner L. Early childhood autism., J. of pediatrics, 1944, v.5, # 3

11.    Mundy P., Sigman M. Specifying the nature of the social impairment in autism. In G. Dawson 9ed) Autism: Nature, diagnosis, Treatment. 1989.

12.    Ricks D.M., Wing L. Language, communication and the use of symbols in normal and autistic children. In L. Wing (ed) Early childhood autism. Oxford, 1976.

13.    Sigman M., Mundy P., Sherman T., Ungerer J. Social interaction of autistic, mentally retarded and normal children and their caregivers. J. of child psychology and Psychiatry 1986. 27, 647-56.

14.    Wing L. (ed) Early childhood autism. Oxford, 1976.