Amy Philofsky

The Down Syndrome Behavioural Phenotype: Taking a Developmental Approach.

David E. Most, D. E. Most, D. Fidler, 2009 .

Autism symptoms in toddlers with Down syndrome: a descriptive study.

Sally Rogers, S. Hepburn, S. Rogers, 2007, Journal of applied research in intellectual disabilities : JARID.

Linguistic and cognitive functioning and autism symptoms in young children with fragile X syndrome.

S. Hepburn, S. Rogers, R. Hagerman, 2004, American journal of mental retardation : AJMR.