1. Hyperactivity: Nature of the syndrome and its natural history;Aman;Journal of Autism and Developmental Disorders,1984
2. Diagnostic and Statistical Manual of Mental Disorders-Revised;American Psychiatric Association,1987
3. Cognitive processes and perceived language performance of retarded persons;Ashman;Journal of Mental Deficiency Research,1982
4. Relation between planning and simultaneous-successive processing;Ashman;Perceptual and Motor Skills,1980
5. Cognitive styles in hyperactive children and the effects of methylphenidate;Campbell;Journal of Child Psychology and Psychiatry,1971