1. Explanations in the study of child language development;Atkinson,1995
2. Assessment of parent–child interaction;Barnard,1990
3. Structural and effective dimensions of play development in young children with Down syndrome;Beegly;Journal of Behavioral Development,1989
4. Interactions between parents and their infants with Down Syndrome;Berger,1990
5. The development of early vocal behaviours and interaction in Down syndrome and non-handicapped infant–mother pairs;Berger;Development Psychology,1983