1. (1992): “Intelligence and development: A Cognitive Theory” Oxford: Blackwell.
2. (1993): Fragile X boys: Evolution of the mental age in childhood. Presented at the 6th International workshop on Fra(X) and XLMR.
3. A Validation Report of the Stanford-Binet Intelligence Scale 4th Edition: An Appropriate Instrument for Assessment of Children with Intellectual Disabilities
4. Fragile-X Syndrome: Variability of Phenotypic Expression
5. (1985): The development of intelligence. In (eds) “Current Approaches to Down's Syndrome.” London: Cassell. pp 167-186.