1. Epidemiology of severe mental retardation in children: Community studies;Abramowicz;American Journal of Mental Deficiency,1975
2. Die autistischen psychopathen im kindersalter;Asperger;Archiv für Psychiatrie und Nervenkrankheiten,1944
3. A comparative study of infantile autism and specific developmental receptive language disorder: I. The children;Bartak;British Journal of Psychiatry,1975
4. A prevalence investigation of childhood psychoses;Brask,1972
5. Sex differences in development of spatial and linguistic skills;Buffery,1972